Meet Libby Weeks, author of the mega-bestselling fantasy series the Falling Children—written as "F. T. Goldhero" to maintain her privacy. With the final manuscript months overdue to her publisher and rabid fans around the world growing impatient, Libby is diagnosed with early-onset Alzheimer's. Already suffering from crippling anxiety, Libby's symptoms quickly accelerate. After she forgets her dog at the park one day—then almost discloses her identity to the journalist who finds him—Libby has to admit it: she needs help finishing the last book. Desperate, she turns to eleven-year-old superfan Peanut Bixton, who knows the books even better than she does. Finding the ending they need will take them down paths they never expected. With the zany verve of Lessons in Chemistry and the unexpected, unlikely friendship of Remarkably Bright Creatures, Libby Lost and Found is a book for people who don't know who they are without the books they love. It's about the stories we tell ourselves and the chapters of our lives we regret. Most importantly, it's about the endings we write for ourselves. "A book for those of us lucky enough to have ever really, truly fallen in love with one."—Laurie Frankel, New York Times bestselling author of This Is How It Always Is