Continuation novel

A sequel by a new author after the original writer's death.

A continuation novel is a sequel written by a new author after the original writer's death, maintaining the style and often the canon of an established series. Such works may be produced officially with permission from the literary estate or unofficially when the original works are out of copyright. The practice carries significance for literary franchises, affecting both the reputation of the deceased author and the commercial viability of the series.

Official continuations

Official continuation novels are produced with the authorization of the late author's literary executors and typically aim to preserve the style and integrity of the original works, sometimes under legal requirement. Examples include Porto Bello Gold by Arthur D. Howden Smith, the James Bond series continued by John Gardner, Raymond Benson, Anthony Horowitz, and others; Young Sherlock Holmes by Andy Lane; The House of Silk by Anthony Horowitz; and the 2014 Hercule Poirot novel The Monogram Murders by Sophie Hannah, authorized by the Agatha Christie estate.

Jill Paton Walsh completed Thrones, Dominations in 1998 with the approval of the Dorothy L. Sayers estate. Eoin Colfer wrote And Another Thing... for The Hitchhiker's Guide to the Galaxy series. Andrew Neiderman continued V. C. Andrews's novels. Nick Harkaway finished Silverview in 2021 and wrote the first full continuation Karla's Choice in 2024.

Some authors have contributed to multiple continuation series, such as Sebastian Faulks, who wrote a James Bond novel and the first authorized Jeeves continuation, Jeeves and the Wedding Bells in 2013. Several authors have produced continuations of August Derleth's Solar Pons. Writing an official continuation carries risks: a poorly executed work may damage the dead author's reputation, while the new author must suppress their own style to match a better-known writer.

Sebastian Faulks described his Wodehouse continuation as a ridiculous undertaking, noting the challenge of matching a great prose stylist. Success, however, can generate substantial sales and revive interest in the original author's works, leading publishers to commission continuations when interest wanes.

Unofficial continuations

When original works are out of copyright, new authors may interpret the franchise freely, subject to character copyright protections. These unofficial continuations, which can overlap with fan fiction and pastiche, may introduce new characters, change time periods, or alter plot elements. For the 110th anniversary of The Tale of Peter Rabbit, Frederick Warne & Co. commissioned Emma Thompson to write The Further Tale of Peter Rabbit, released in 2012, in which Peter ends up in Scotland. Thompson later wrote The Christmas Tale of Peter Rabbit in 2013 and The Spectacular Tale of Peter Rabbit in 2014.