High Quality Content by WIKIPEDIA articles! Seussical is a musical by Lynn Ahrens and Stephen Flaherty based on the books of Dr. Seuss that debuted on Broadway in 2000. The play`s story is a rather complex amalgamation of many of Seuss`s most famous books. After a Broadway run, the production spawned two US national tours and a UK tour. It has become a favorite for school, community and regional theatres.