Living and Learning in the Pacific Northwest
This post by Christine at The Thinking Mother is the most complete description of a living book that I can find. Here is a short quote, please click to read the whole post.
A living book is interesting. A living book draws the reader in and compels us to sit and read it. When reading a living book we are happy to be reading and we are not bored. We are engaged and our mind does not drift. The book captivates us and as we read we make connections, emotional or factual and/or we are entertained. Depending on the topic and type of book we may feel emotionally connected to the characters or the topic. As we read we begin to care about the character or the subject. If the book contains non-fiction facts or other references such as geographical or cultural information, we are so engaged in the book that we instantly absorb that information, and we retain it after we finish the book.