In the quote from "I Funny: A Middle School Story" by James Patterson, the author humorously compares dogs and books as sources of companionship. It suggests that books are a man's best friends when outside of a dog, highlighting their value in providing comfort, knowledge, and entertainment.
The quote also humorously notes that inside a dog, it would be too dark to read, emphasizing the impracticality of reading inside a dog. Overall, it blends humor with the appreciation of books as essential friends in everyday life, especially for those who enjoy reading.