Okay, Bigfoot never read them (he's illiterate) and the books only have the magical power of giving you knowledge and transporting you by way of your imagination, but everything on my shelf is 2-for-1 as long as anyone can see this and let me know about it.  Make one of those things an audio book and I'll make it 3-for-1.  My bookshelves are overcrowded and starting to sag under the weight of all those books.  Just be sure to send me a message with the codeword "BIGFOOT" in it.  You will make Bigfoot very happy if you do so.