Llewellyn George self-published a number of small astrological pamphlets before he published his first bestseller, The Llewellyn Moon Sign Book and Gardening Guide, in 1906.

In 1910 Llewellyn George published his astrology text, The A to Z Horoscope Maker and Delineator, which became a classic and is constantly revised and updated, firmly establishing Llewellyn Publications in the astrology community. George Llewellyn died in 1954.