Bartholomew and the Oobleck is a 1949 book by Dr. Seuss (Theodor Geisel). It follows the adventures of a young boy named Bartholomew Cubbins, who must rescue his kingdom from a sticky green substance called "oobleck." The book is a sequel of sorts to The 500 Hats of Bartholomew Cubbins. Unlike most of Geisel's books, which are written in anapestic tetrameter, Bartholomew and the Oobleck is a prose work, like its predecessor.
Geisel said he drew inspiration for the book from a conversation he overheard while stationed in Belgium during World War II. During a rainstorm, one of his fellow soldiers remarked, "Rain, always rain. Why can't we have something different for a change?"