Sherlock Holmes and the Crusader's Curse — Stuart Douglas

A new novel from the author of acclaimed Sherlock Holmes patisches The Albino's Treasure, The Counterfeit Detective and The Improbable Prisoner

     The last Lord Thorpe, reclusive owner of Thorpe Manor, has died. Sherlock Holmes and Dr. Watson are invited to the auction at which the estate will be sold off, in hopes Holmes can uncover the whereabouts of the missing De Trop Diamond, a jewel-encrusted gemstone brought back from the Crusades by an earlier member of the Thorpe dynasty - and the source of a legendary curse.

from TI 9781789091588 TR.