Rick “Chase” Chasen, a retired San Diego police detective whose partner died of cancer a year ago, joins a friend on an organized walking tour in southwestern England in hopes of moving past his grief. Instead, Chase finds himself in the midst of a murder inquiry when another walker, Ronald Gretz, is pushed off a cliff, dying instantly. The local police suspect Gretz’s much-younger wife who inherits his wealth, but Chase’s detective instincts tell him that she’s not the killer. Debut author George relates how Chase uncovers potential motives of other members of the walking group; in the process, Chase becomes a target for the murderer. George, whose own love of long-distance walking inspired the book, offers a satisfying mystery with a well-drawn interesting protagonist. (Kensington Cozies, March 26)