If you're famous you can't let all your stuff be found until you die.

Come out! Come out! Creatures large and small.
Calling all grox, grotz, gussets and galls.
I want sneedles, sneetches and the sala-ma goox
Come out, for I, Steve, have a message for you.

Dr. Charles Cohen, a Massachusetts dentist,
a Seussologist, and a cavity menace,
earlier today has brought to my attention,
 there are stories missing from every Seuss collection.

"Gasp!" "What?" screeched the animals in a unisoned call.
 Don't worry my friends, communist radio reports they will be published this fall.
http://www.npr.org/2011/04/13/135378436/the-bippolo-seed-the-lost-dr-seuss-stories

-Steve