"The best kind of book is a magic book."

One of my favorite literary tropes is what TVTropes call the "Portal Book" (although "I Wish It Were Real" and "In Defense of Storytelling" are also applicable). That is, people travel into books, or characters from books show up in the reader's world, or people and things that were thought to be "just" stories turn out to have been part of our reality all along. And so on. Basically, I love stories that explore the power of stories, and use fantastical elements to do so. I especially love when they show how storytelling can be both necessary and deeply dangerous.

Below, I've discussed some of my favorite books (four prose works, one graphic novel series) that make use of this trope.

( the top five, plus some extras )

What are your favorite stories in which the "magic of reading" becomes literally magical?