This was the first bibliography and guide to the American mass market paperback book, and it remains one of the most definitive. The major index is by author, a

This work is the only comprehensive guide to sequels in English, with over 84,000 works by 12,500 authors in 17,000 sequences.

"This essential sourcebook to the spy and thriller novel offers mystery fans fully annotated entries on more than 1,300 titles by over 150 authors in the genre.