Aladdin Paperbacks is one of several children's-book imprints owned by Simon & Schuster. It was established by Jean E. Karl at Atheneum Books where she was the founding director of the children's department (1961). Atheneum merged with or was acquired by Scribner's in 1978, then MacMillan in 1984, before the acquisition by Simon & Schuster in 1994.
There may have been previous uses of 'Aladdin' as a brand name in the book industry.