Death is the hardest puzzle to solve. Margarita Williams escaped death at a young age, but its shadow has followed her all her life. Now, amidst the chaos of a new Australian roommate and mysterious, menacing neighbors, Death has set the puzzlemaker a puzzle of her own. Someone is killing her fellow geocachers, one by one. Supersmeller Bindi Ryan left Australia to marry a man who abandoned her the minute her plane landed in Oregon. When thieves steal a local sculpture and a teenage friend is blamed, Bindi and her nose must prove him innocent and find the real culprits. But are she and Margarita working on two mysteries, or one? If they can’t solve the final puzzle, the killer will strike one final, deadly blow.

Love is a many murdered thing. Three months after catching a killer, Margarita escapes to a historic hotel with Drew and Bindi for a Valentine’s weekend of geocaching. But during the love-themed costume ball, the CEO of a satellite navigation company keels over—and then his body vanishes. As the weekend progresses, Margarita discovers threatening messages in the logbooks of local geocaches. Her attempts to unmask the blackmailer are thwarted by the last person she would have expected. With a stubborn sheriff on the case, Margarita and Bindi must take matters into their own hands. But whether they’re chasing one killer or two, they have a problem: all their suspects seem to have solid alibis. Between misunderstandings, outright lies, old secrets, and more than one corpse, it’s not Love in the air anymore. It’s Death.

Margarita and Bindi have big plans for the Fourth of July, involving borrowed bicycles, a geocaching power trail, live podcasts, and plenty of fun. But their day quickly goes awry when they stumble upon what looks like a murder in progress. Strange rivalries and secret alliances test Margarita’s puzzle-solving skills, and Bindi suffers a rather painful setback when she comes face to face with someone she never thought she’d see again. The overly stoic sheriff can’t be in two places at once, so the girls need to figure out whodunit and rescue the next potential victim before the explosive finale.