If on a winter’s night a traveler by Italo Calvino - a book about reading.
A Spy in the Land of the Living. It’s my own novel and since you can see it, right there on the poster, one assumes that it has actually been completed and published. 
Either Sagan’s “Demon Haunted World” or "Good Omens by messrs Gaiman and Pratchett.
Or “How to Goodbye Depression” a guide to curing depression by contracting the anus one hundred times per day. As much fun for the Engrish as it is for the subject.
Master and Commander. And I’d have the rest of the series stacked precariously next to me.
Ditto this 
I’d be holding one of the following with the rest stacked up beside me, and the background would be stacks at the library:
*Torpedo Juice * - Tim Dorsey
*The Stand * - Stephen King
The Complete Works of the Brothers Grimm
*The Count of Monte Cristo * - Alexandre Dumas
*Robinson Crusoe * - Daniel Defoe
How to Eat Fried Worms - Thomas Rockwell
The Barnes & Noble edition of Vanity Fair with the original author’s illustrations or this completely different book.
I just got this visualization of a guy on one of these posters leaning on the stack of books you mention. 
I’m trying to read “How The Other Half Lives,” but Riis’s convoluted Victorian sentences make it a bit difficult.