Question: is the age of adaline based on a book

Answer: No, The Age of Adaline is a 2015 American romantic fantasy film directed by Lee Toland Krieger and written by J. Mills Goodloe and Salvador Paskowitz. The film stars Blake Lively in the title role, with Michiel Huisman, Kathy Baker, Amanda Crew, Harrison Ford, and Ellen Burstyn in supporting roles. Narrated by Hugh Ross, the story follows Adaline Bowman, a young woman who stops ageing after an accident at the age of 29.