2005 "First Edition" stated on copyright page; Harper Collins Publishers, New York; hardbound in green fabric boards with silver signature of Shel Silverstein on cover with bunny and silver stamp lettering along spine; very good condition with unmarked pages; dust jacket very good.
 
goodreads review -
From the legendary creator of Where the Sidewalk Ends, A Light in the Attic, Falling Up, and The Giving Tree comes an unforgettable new character in children's literature: Runny Babbit.

Runny Babbit is Shel Silverstein's hilarious and New York Times-bestselling book of spoonerisms—words or phrases with letters or syllables swapped: bunny rabbit becomes Runny Babbit.

Welcome to the world of Runny Babbit and his friends Toe Jurtle, Skertie Gunk, Rirty Dat, Dungry Hog, Snerry Jake, and many others who speak a topsy-turvy language all their own.

So if you say, "Let's bead a rook
That's billy as can se,"
You're talkin' Runny Babbit talk,
Just like mim and he.