The Night Bookmobile. by Audrey Niffenegger

First serialised in the Guardian, The Night Bookmobile tells the story of a young woman who one night encounters a mysterious disappearing mobile library that happens to stock every book she has ever read. Seeing her history and her most intimate self in this library, she embarks on a search for the bookmobile. Over time, her search turns into an obsession as she longs to be reunited with her own collection and her memories.