Non-fiction
Saki: A Life of Hector Hugh Munro, with six short stories never before collected, by A. J. Langguth (2004)
Vicious Circles and Infinity: An Anthology of Paradoxes, by Patrick Hughes and George Brecht (2007)
Manufacture and Uses of Alloy Steels, by Henry D. Hibbard (2011)
Legacy: A story of racism and the Northern Ireland Troubles, by Jayne Olorunda (2014)
Europe in the Sixteenth Century, by H.G. Koenigsberger and George L. Mosse (2017)
The Eleventh Hour, by Jon Arnold (2022)

Speculative fiction
Camouflage, by Joe Haldeman (2006)
I Am Not A Serial Killer, by Dan Wells (2011)
Roger Zelazny’s The Dawn of Amber: Book 1, by John Gregory Betancourt (2021)

Doctor Who, etc
Doctor Who Files 1: The Doctor, by Jacqueline Rayner with a story by Stephen Cole (2009)
Doctor Who Files 2: Rose, by Jacqueline Rayner (2009)
Doctor Who Files 3: The Slitheen, by Jacqueline Rayner (2009)
Doctor Who Files 4: The Sycorax, by Jacqueline Rayner with a story by Stephen Cole (2009)

The Best
Jayne Olorunda’s autobiography of growing up in Northern Ireland during the Troubles, before and after her Nigerian father was killed by an IRA bomb, is essential reading. (Review; get it here)

Honorable mentions
A.J. Langguth’s biography of Saki has a lot of fascinating material. (Review; get it here)
Joe Haldeman’s Camouflage takes the veteran author in some surprising directions. (Review; get it here)

The one you haven’t heard of
Jon Arnold’s Black Archive on The Eleventh Hour teases out a lot more about the Eleventh Doctor’s first story. (Review; get it here)

The one you can skip
I only read H.D. Hibbard’s pamphlet on alloy steel because he was my great-grandfather. It was already six years out of date when it was published in 1919. (Review; get it here)