I love to read, and have a lot of favorite books; so picking one is not easy. However, I think the book that I probably most enjoyed reading, and have read several times, is a story called "Emergence" by David Palmer (if I remember right). Emergence is the story of a young teenage girl, emerging from a bomb shelter, and she travels across the country with only her Blue Macaw, looking for other survivors.
She keeps a kind of shorthand diary, and that is how the book is presented.
It is great reading, and I would recommend it to anyone as an excellent book.