|Written by||Judy Freudberg and Tony Geiss|
|Series||Sesame Street Book Club|
The Count is bored one day, since he has nothing to count, not even his pet bats. He gets a great idea... he'll throw a party with twenty guests (counting himself, of course), twenty different kinds of food, a twenty-layer cake, and many more things that add up to twenty. His friends show up to the party: Ernie, Bert, Cookie Monster, Oscar, The Amazing Mumford, Big Bird, Super Grover, Herry Monster, Prairie Dawn, Biff, Sully, Betty Lou, Rodeo Rosie, Roosevelt Franklin, Bob, Mr. Hooper, Maria, Luis, and Susan.
Reissued along with other Sesame Street books in 1986 in the Sesame Street Story Land book.