Lottie Reeves has always struggled with anxiety, and when her beloved Aunt Helen dies, Lottie begins to fear that her own unexpected death might be waiting around every corner.

Aunt Helen wasn’t a typical aunt. She was the author of the best–selling Alvin Hatter series, about siblings who discover the elixir of immortality. Her writing inspired a generation of readers.

In her will, she leaves one last writing project—just for Lottie. It’s a series of letters, each containing mysterious instructions designed to push Lottie out of her comfort zone. Soon, Lottie’s trying some writing of her own, leaping off cliffs, and even falling for a boy she’s only just met. Then the letters reveal an extraordinary secret about the inspiration for the Alvin Hatter series. Lottie finds herself faced with an impossible choice, one that will force her to confront her greatest fear once and for all.