From the back cover of the included booklet:
A Rugose Compendium of Squamous Stuff
This packet contains essential play-aids for all Call of Cthulhu® players and keepers.
A specially-constructed 8.5x33" colorful four-panel Keeper’s Screen featuring an additional 8.5x11" panel — instant access to important tables and rules from the Cthulhu game while minimizing play interference.
A brand-new adventure, "The Dead-Man Stomp," was specially written for this package, and is suitable for both beginning and experienced players.
Eight copies of the new, updated 1920s Character Sheet provide a convenient place for your players to summarize game data and are ready-to-use.
The Monster Master, five copies of a new form on which the keeper can organize game data for his crazed cultists, maniac madmen, wicked wizards, and degenerate denizens of the Cthulhu Mythos.
Each packet contains one of two different stickers, either a back-window university sticker for your car, or a "Go Pods!" bumper sticker proclaiming your loyalty to old M.U.
A handy Miskatonic U. Note Pad, in a new style, provides a convenient spot for keepers to jot sinister ideas, devious plots and terrifying notes.
A special Mythos Bookcover in one of three styles, either The Necronomicon, Cultes des Goules, or De Vermiis Mysteriis, can be used to protect your favorite haunting tome.
A giant 20x27" Full-Cover Poster depicts a terrifying aspect of the Mythos. There are five different posters: Mansions of Madness, Cthulhu Classics, Masks of Nyarlathotep, Great Old Ones, and Arkham Unveiled, one in each kit. Collect them all!