Others cautioned that audio books would spawn death on the highway.
That book spawned over 40 best-selling Clifford books, two television series, merchandise, and a live musical.
The book spawned a five-issue comic series, released by Innovation in 1993.
The books continue to be published in Russia and have spawned several sequels.
The book was an unexpected success and spawned seven sequels.
Virtually every book has spawned a more ambitious project.
The book, published in 1983, spawned a popular television mini-series the next year.
The book spawned an entire industry of historical romantic novels and films.
The book proved quite popular with conspiracy theorists, and spawned several sequels.
The book spawned much debate in the 1960s over whether the author really intended to call Eisenhower a Communist.
