The cover of this book claims that it contains six posters.
This book is 7 5/8" x 10 7/8". Inside are six twice-folded posters that you can gently tear out, unfold, and do poster stuff with! For US $10, that's not much per poster. Of course, if you pay a bit more, you can buy larger posters that don't have big creases in 'em.
The artwork includes some recent covers - I recognised ASM (Vol. 2) #48 and #50. Lovely art, actually, by Frank Cho and J. Scott Campbell respectively. Another is the "bendy-fingered Spidey climbing a grey wall" from the Dynamic Forces variant of Ultimate Spidey #1. I didn't recognise the other three, two of which feature Doc Ock. Please feel free to point out where they're from if you recognise 'em.
It says it contains six posters. It contains six posters. I got my ruler out, and it's quite right about the sizes, within a couple of percent. The art is shown on the back, for you to see before you buy. Hey, truth in advertising, whaddya know!
What you see is what you get. If you like the idea of six full-color posters folded neatly into a book all for $10 (or less on Amazon) then you'll like this book. Nuff said.