Very simple swap.
Just take a picture of the PAPER book you are reading right now, or a book that you've read recently. This can be one picture, or more, or even a collage. Photo of the book cover is required.
Only your own pictures, please.
And, of course, write a few sentences about this book.
That's all :) and DON`T FORGET ABOUT BCC FUNCTION AND YOUR SPAM-FILTER