I can see Spike as an avid secret reader... when he thinks Twilight isn't looking, because she would just overdo it talking about books and recommending others.
That book has a lot of missing pages...Now Spike already seen how to read a book, since he is growing up with twilight Sparkle, so He must be secretly eating the pages...or it is a minor flaw of the picture. I vote for the first option. I can see Spike thinking to himself: I shouldn't ruin books, but how does it taste? *consumes one page* It's delicious... *giggle*
That book has a lot of missing pages...Now Spike already seen how to read a book, since he is growin