The Perfect Paragon — M.C. Beaton

AGATHA RAISIN...AND THE CASE FROM HELL

She's nosed in on murder investigations, annoyed law enforcement on two continents, and been targeted by everyone from a hit man to a killer secretary. But now Agatha Raisin must take on her greatest nightmare--a divorce case. Bad enough that her struggling detective agency needs the whacking great fee pompous businessman Robert Smedley is offering to prove his wife is unfaithful; it's even worse that Mrs. Smedley is the kind of sweet, accomplished, lovely, gentle, and all- around perfectly wonderful spouse that Agatha couldn't be in a thousand years.

So, when Smedley turns up poisoned, Agatha is relieved enough to help his now-desperate wife clear her name. And with the assistance of her firm's eccentric new staff, Agatha enthusiastically follows leads and a batch of suspects through the English countryside's seediest byways. But the police aren't about to let an interfering amateur beat them to the punch. And as Agatha hits one dead end after another, a particularly devious killer is looking forward to making sure the indomitable Agatha never has to worry about old age--or anything else.