In the 1970s, Marvel released several paperback books.  This is the Best of Marvel Paperback set that incorporated several of these stories.  This set features 4 of them from 1977 and 1978.  It includes stories of the Hulk, Fantastic Four and of course Amazing Spider-Man.  It comes with the original cover (holder) for the set.

Best of Marvel 4 Book Set Pocket Book Paperback PB Pocket – Available NOW on eBay