Clipped from Diversions Of The Groovy Kind: During 1978/79, Marvel Comics struck a deal with Simon & Schuster, who'd already been publishing Stan Lee's Origins books since 1977. Most of the cover art is by Bob Larkin (who was the main cover artist for Marvel's Black and white mags at that time), with a few really groovy ones tossed in by guys like Dave Cockrum, and John Buscema.
During roughly a year's span, Pocket Books published 11 novels featuring Marvel super-heroes. Here's a quick rundown:
#1: The Amazing Spider-Man: Mayhem in Manhattan by Len Wein and Marv Wolfman
#2: The Incredible Hulk: Stalker from the Stars by Wein, Wolfman & Joseph Silva
#3: The Incredible Hulk: Cry of the Beast by Richard S. Meyers
#4: Captain America: Holocaust for Hire by Joseph Silva
#5: The Fantastic Four: Doomsday by Marv Wolfman
#6: The Invincible Iron Man: And Call My Killer...Modok! by William Rotsler
#7: Dr. Strange, Master of the Mystic Arts: Nightmare by William Rotsler
#8: The Amazing Spider-Man: Crime Campaign by Paul Kupperberg
#9: Stan Lee Presents: the Marvel Superheroes edited by Len Wein and Marv Wolfman
#10: The Avengers: The Man Who Stole Tomorrow by David Michelinie
#11: The Hulk and Spider-Man: Murdermoon by Paul Kupperberg
Dork Note: When I was a kid I bought #9 (at a Goodwill); which had an X-Men story in it. I dreamed of turning it into a comic, but never did. As it happens - somewhere along the way - I lost it. I found a copy of the book decades later at a used book store in Hollywood. I still own it as well as some of the other Marvel paperbacks.