It's the night before Christmas when Casey and Mike get the call. A 12-year-old girl, stuck between a rock and a hard place. Her father is on a ventilator, fighting for his life, while her mother is currently on remand in prison. Despite claiming she attacked him in self-defence, she's been charged with his attempted murder. The girl is called Bella, and she's refusing to say anything. The trouble is that she is also the only witness....

Casey Watson is back, doing the job she does best - rolling up her sleeves and fostering the children who, on first meeting, seem like hopeless cases. But when she meets Miller and discovers the truth about his disturbing childhood, even Casey begins to doubt if this child will ever be able to accept love. Found naked and alone on a railway track, Miller was just five when he was first admitted into the care system.

A 5-year-old boy, Ethan, is brought to Casey in the middle of the night after the sudden death of his young mother after a drug overdose. Estranged from her parents, Ethan’s mum had been abused by her ex-partner, and began taking drugs to cope. Ethan is obviously lost and bewildered, and regularly wakes up screaming for his mum in the night. He begins to lash out at other kids at school and his behaviour becomes more volatile.

Damian is just seven when he is taken in by foster carer Cathy Glass. His mother, Rachel, loves her three young children dearly, but she is vulnerable, naïve and unable to cope on her own. Cathy sets about helping Damian overcome his eating issues, with the hope that he will eventually return home. But when Rachel’s new boyfriend, Troy, arrives on the scene, Cathy becomes deeply concerned. She soon realises that Damian and his siblings are in great danger.

The Watsons are no strangers to sibling placements, but when Casey takes the call from her supervising social worker one frosty January morning, she can instantly tell from the tone of her colleague’s voice that there’s a complicated case ahead. And she’s right. A four-day-old baby boy called Tommy - born in prison - plus his four-year-old half-brother, the lively Seth. A month later, the very moment she gets out of prison, the boys’ mother - a 19-year-old called Jenna - also follows.

It's late on Friday night when Casey's mobile starts to ring. She is expecting it to be her daughter, Riley. But it isn't Riley. It's a woman from the Emergency Duty Team. So begins Casey and Mike's latest fostering challenge - a 15-year-old girl called Keeley who's run away from her long-term foster home 25 miles away.

Harley, 13, has been sectioned under the mental health act after attempting suicide. She was spotted climbing the railings on a footbridge that crossed a busy motorway and pulled to safety by a member of the public. After six weeks in hospital, social services are looking for a short-term placement so she can be kept safe while family therapy takes place. Harley has a family - a widowed mother and an older sister, Milly, who left home with her long-term boyfriend just over a year ago.

Casey's Unit is, as ever, full of troubled, disaffected pupils, and new arrival Leo is something of a conundrum. Thirteen-year-old Leo isn't a bad lad - in fact he's generally polite and helpful, but he's in danger of permanent exclusion for repeatedly absconding and unauthorised absences. Despite letters being sent home regularly, his mother never turns up for any appointments, and when the school calls home she always seems to have an excuse.

After taking a few weeks off work, Casey is presented with a new foster child: 14-year-old Elise, whose Mum left her at just five years old. At first, she’s no trouble at all, that is until she falsely accuses another carer, Jan, of acting inappropriately towards her. It turns out this isn’t the first lie Elise has told—her previous carer was constantly following up allegations Elise had made of people bullying her, trying to have sex with her or hurting her physically.

Angie, 6, and sister Polly, 4, are utterly distraught when they arrive to stay with foster carer Cathy Glass. Their older half-sister Ashleigh has accused their father of rape, and the two young sisters have been removed from home to keep them safe. Cathy tries to comfort the girls, but they are inconsolable. They just want their mummy and daddy, who they love dearly. The girls appear to have been well looked after, but as they settle and start to talk of life at home, it becomes clear something is badly wrong.

From the author of Number One bestseller Damaged comes the poignant and shocking memoir of Cathy's recent relationship with Tayo, a young boy she fosters whose good behaviour and polite manners hide a terrible past. Tayo arrives at Cathy's with only the clothes he stands up in. He has been brought to her by the police, but he is calm, polite, and very well spoken, and not at all like the children she normally fosters. The social worker gives Cathy the forms which should contain Tayo's history, but apart from his name and age, it is blank.

When Stevie’s social worker tells Cathy, an experienced foster carer, that Stevie, 14, is gender fluid she isn’t sure what that term means and looks it up. Stevie, together with his younger brother and sister, have been brought up by their grandparents, as their mother is in prison. But the grandparents can no longer cope with Stevie’s behaviour, so they place him in care. Stevie is exploring his gender identity, and like many young people he spends time online. Cathy warns him about the dangers of talking to strangers online and advises him how to stay safe.

From the author of Sunday Times and New York Times best seller Damaged, the gripping story of a woman caught in a horrific cycle of abuse - and the desperate lengths she must go to in order to escape. When Aisha spots an ad for a 'personal introductory service for professionals' in the newspaper, she could never have guessed it would lead to such a perfect marriage. But you should be careful what you wish for.... Mark is sorry the first time he hits Aisha.

Cruel to Be Kind is the true story of Max, age six. He is fostered by Cathy while his mother is in hospital with complications from type 2 diabetes. Fostering Max gets off to a bad start when his mother, Caz, complains and threatens Cathy even before Max has moved in. Cathy and her family are shocked when they first meet Max. But his social worker isn't the only one in denial; his whole family are, too.

Nine-year-old Archie and his five-year-old sister, Bobbi, are taken into emergency police protective custody after an incident of domestic violence at their family home. Rosie collects the children from their out-of-hours foster carer on New Year's Day and instantly recognises Archie from a domestic violence workshop she helped with. Rosie remembers that when asked what he enjoyed most about the course, Archie said, 'The biscuits'. Social workers are concerned that Archie and Bobbi have been neglected.

Named after the lager that christened her at birth, Stella's life is characterised instability and neglect. Her teenage mother abandons her in the first few weeks of her life, and left in the 'care' of her father, she ends up lying deserted in a house with no food, no water, no clothes and no warmth. She eventually lands in the care of foster carer Louise, who is determined to change her life for the better.

It's the night before Christmas when Casey and Mike get the call. A 12-year-old girl, stuck between a rock and a hard place. Her father is on a ventilator, fighting for his life, while her mother is currently on remand in prison. Despite claiming she attacked him in self-defence, she's been charged with his attempted murder. The girl is called Bella, and she's refusing to say anything. The trouble is that she is also the only witness....

Brought to Casey as a short-term emergency placement, 14-year-old Adrianna arrives with nothing but her gratitude. Having turned herself in to a social services office some 100 miles away, she has no possessions, no English and, apparently, no history - not that she's willing to share, anyway. She is a beautiful young Polish girl, with the bearing of a ballerina, but is terrified, malnourished and unwell.

In a forgotten corner of Wales, a young girl languishes in a home for troubled children. Abandoned by her parents because of her violent streak, Jessie - at the age of 10 - is at risk of becoming just another lost soul in the foster system. Precocious and bold, Jessie is convinced she is possessed by the devil and utterly unprepared for the arrival of therapist Torey Hayden. Armed with patience, compassion, and unconditional love, Hayden begins working with Jessie once a week. Then, Jessie makes a stunning accusation against one of Hayden’s colleagues.

Meet Tom. Or Dr O’Grady, as he used to be called. When you pass him on the street, most people don’t even give him a second glance. You see, Tom isn’t living his best life. Burdened by grief, he’s only got his loyal dog, Bette Davis, for company and a rucksack containing his whole world. Then there’s Ruth and her son, DJ, who no longer have a place to call home. But Ruth believes that you can change the world by helping one person at a time - and Tom needs her help. There are a thousand ways to find your home - you just need to be brave enough to look for them.

Beth Mahony is a stay-at-home mother of two daughters, Lucy and Charlotte. She’s also a blogger, whose alter ego, Lizzie, paints a picture of a busy, happy life. Originally from Australia, Beth and her family have lived in New Jersey for ten years. When an opportunity to relocate to Australia arises, the Mahonys decide to return to their native country. The move comes at the perfect time: Charlotte, the youngest daughter, has been accused of being the ringleader of a clique of girls whose dangerous initiation rites leave a child in hospital.

In 2006, Kate MacDougall was working a safe but dull job at the venerable auction house Sotheby’s in London. After a clumsy accident nearly destroyed a precious piece of art, she quit Sotheby’s and set up her own dog-walking company. Kate knew little about dogs and nothing about business, and no one thought being a professional dog walker was a good use of her university degree. Nevertheless, Kate embarked upon an entirely new and very much improvised career walking some of the city’s many pampered pooches, branding her company "London's Number One Dog Walking Agency".

Cat Kinsella overcame a troubled childhood to become a detective constable. When she’s called to the scene of a murder, not far from the pub her estranged father still runs, she discovers that Alice Lapaine is dead. Cat and her team suspect Alice’s husband, until she receives a phone call that links the victim to Maryanne Doyle, a teenage girl who went missing in Ireland 18 years earlier. The call raises uneasy memories for Cat. Though she was only a child, Cat knew that her father wasn’t telling the truth when he denied knowing anything about Maryanne or her disappearance.

Angela was just a baby when she was abandoned, and a children's home is no place to grow up. When manager Ray takes girls off to his 'den' in the garden, they always come back crying.... So, when wealthy couple James and Rosemary come to choose a child to adopt, Angela is desperate to escape. Years later, Angela starts to search for her birth mother, Evelyn, hoping to heal the scars of her childhood. But strange and sinister events start to unfold. And Evelyn fears she may not survive her daughter's return.

An achingly funny story from the author of the best-selling You Had Me at Hello. When Edie is caught in a compromising position at her colleagues' wedding, all the blame falls on her - turns out that personal popularity in the office is not that different from your school days. Shamed online and ostracised by everyone she knows, Edie's forced to take an extended sabbatical - ghostwriting an autobiography for hot new acting talent, Elliot Owen. Easy, right? Wrong.

Harley, 13, has been sectioned under the mental health act after attempting suicide. She was spotted climbing the railings on a footbridge that crossed a busy motorway and pulled to safety by a member of the public. After six weeks in hospital, social services are looking for a short-term placement so she can be kept safe while family therapy takes place. Harley has a family - a widowed mother and an older sister, Milly, who left home with her long-term boyfriend just over a year ago.