TRic

After the holidays, Humphrey is shocked by a big surprise in Room 26—a new class pet! Humphrey tries to be welcoming, but Og the frog doesn't respond to any of his friendly squeaks or visits (remember, he has a lock-that-doesn't-lock). Plus, the students are so interested in Og, they almost stop paying attention to Humphrey altogether. Humphrey doesn't like the mad-bad-sad feelings he's had since Og came, but luckily he still gets to have adventures with different kids on the weekends. Friendship can be tricky, but Humphrey is an intrepid problem-solver.

Calvin Waffle doesn't believe in bad ideas. Danny knows his friend Calvin has crazy ideas, so he's not surprised when Calvin suggests they start a Rent-a-Pet business. After all, Calvin's Aunt Ruth wants the boys to watch her dog while she's away, and what better way to get the miniature Collie off their hands than loaning him to a kid in the neighborhood for a few days? But in order to rent a pet, you need a renter. Which Calvin and Danny don't have. Can the two drum up some business before it's too late? Or will their plan go to the dogs?

Something has gone wrong in Danny and Calvin’s fourth-grade classroom - out of the blue, Mrs. Cakel has transformed from a rampant rule-enforcer to a quiet excuse-accepter. Has she been replaced with an alien? Has she undergone a top-secret personality makeover? Danny and Calvin decide there’s only one way to find out what’s really going on - spy. But spying soon leads to a greater mystery filled with dog chasing, jelly-injected donuts, prune butter-included experiments, riddle mania, and more!

Danny Cohen and Calvin Waffle are two very different kids. Danny likes playing baseball; Calvin enjoys strange experiments. Danny follows the rules at school; Calvin tries to drive his teacher crazy. Danny and Calvin decide to team up for the big jelly bean experiment. Will it lead to trouble? Maybe. Will they have fun trying? You can count on it.