From the back of the book:
Will the real MARVEL SUPER HEROES please stand up?
Add a new dimension to your MARVEL SUPER HEROES GAME – the third dimension! These MARVEL SUPER HEROES ADVENTURE FOLD-UP Figures are three-dimensional figures of your favorite heroes and villains. This package includes over 500 figures, and updates many of the figures previously unavailable… until now! The Figures include members of the Mighty Avengers, Fantastic Four Uncanny X-Men, A.I.M., Doctor Doom, Galactus, and bunches more. You've been waiting for this one, Marvelites - Don't miss it!
This package includes 46 sheets of full-color, fold-up figures and simple, illustrated instructions. Assembly required.