Maine mystery author Kieran Shields will discuss his latest work, “A Study in Revenge,” at the South Portland Public Library.

In this follow-up to Shields’ premiere historical thriller, “The Truth of All Things,” detectives Perceval Grey and Archie Lean team up again, this time to solve a murder mystery that includes a bizarre occult scene linked to a centuries-old magical relic. 

WHEN: 6:30 to 8 p.m. Tuesday

WHERE: South Portland Public Library, 482 Broadway, South Portland

HOW MUCH: Free

INFO: 767-7660; southportlandlibrary.com