This is an encyclopedic work, arranged by broad categories and then by original authors, of literary pastiches in which fictional characters have reappeared in new works after the deaths of the authors that created them. It includes book series that have continued under a deceased writer's real or pen name, undisguised offshoots issued under the new writer's name, posthumous collaborations in which a deceased author's unfinished manuscript is completed by another writer, unauthorized pastiches, and "biographies" of literary characters. The authors and works are entered under the following categories: Action and Adventure, Classics (18th Century and Earlier), Classics (19th Century), Classics (20th Century), Crime and Mystery, Espionage, Fantasy and Horror, Humor, Juveniles (19th Century), Juveniles (20th Century), Poets, Pulps, Romances, Science Fiction and Westerns. Each original author entry includes a short biography, a list of original works, and information on the pastiches based on the author's characters.

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