A Study in Sorcery is an alternate history novel by Michael Kurland featuring Randall Garrett's fictional detective character Lord Darcy.

It was first published in paperback by Ace Books in 1989; a trade paperback edition was issued by the Borgo Press imprint of Wildside Press in May 2011, followed by an ebook edition from the same publisher in July of the same year, reissued in February 2019.

In New England (a term which in this history includes the whole of our North America) an Azteque Prince is found dead on a stone altar.

Darcy must identify the killer and determine whether the Azteques are returning to human sacrifice.

The book was reviewed by John C. Bunnell in Dragon Magazine, September 1989.