Echoes of the past. Powers of the present. The deeper the truth, the darker the price.

With her Resonant powers no longer a secret, Vesper Ainsley has become a target for every magical faction in Nightreach. But a greater threat lurks within her mind—vivid echoes of her friend Selene's final days, memories that aren't her own yet feel increasingly real. These dangerous visions may hold the key to stopping Lucian D'Arco—a mysterious figure whose dark magic threatens both the mortal and magical worlds.

Her path collides with Detective Inspector Blair Calloway, who's investigating the suspicious circumstances of Selene's death with an arsenal of enchanted tools and deep knowledge of London’s supernatural underworld. Together with the mage Rafe, they navigate Nightreach's darkest corners while the silver-haired mage Cassandra hunts them through the twisted streets, determined to claim both Vesper and her grimoire for D'Arco's sinister plans.

As conspiracies unravel and betrayals come to light within the Concordat itself, Vesper must master her evolving powers before they consume her entirely. But in a city where ancient magic pulses beneath the streets and shadows hide deadly secrets, success may require sacrificing the very memories that make her who she is.

For fans of dark urban fantasy and suspenseful magic, A Frequency of Truth delves deeper into a world of ancient power and intrigue, where memories become weapons and the search for truth could cost someone their soul.