Is a certain vet detective about to become an endangered species?

It's been over a decade since Jessica Popper spoke to vet-school friend Erin Walsh. So when Erin calls out of the blue, Jess agrees to meet her. When Erin doesn't show, Jessie begins to suspect that her old pal was making a monkey out of her--until she learns that Erin was murdered.

Jessie can't resist getting involved, but her sleuthing quickly pulls her into a jungle of suspects. Did Erin's husband, Ben, kill her - or was it the eccentric lizard-loving coworker with whom she may have been monkeying around? Was Ben's outrageously wealthy new partner trying to cover up some monkey business? Or was it Erin's ambitious boss, a distinguished primate specialist determined to remain top banana in her field? With the killer going ape to stay hidden, even Jess's animal instincts might not save her from a fate more fatal than a barrel of monkeys.