Eglin's engaging third horticultural cozy (after 2006's Lost Gardens
) pits retired London botanist Lawrence Kingston against rapacious, lawless foes when his longtime friend and colleague, Stewart Halliday, goes missing. Drawing on his cruciverbalist skills, Kingston interprets a coded message in his friend's date book that leads to another cryptogram. Clues indicate that Halliday discovered how to desalinate seawater with a unique crossbred water lily, a scientific breakthrough with potentially far-reaching benefits—and profitability. Kingston believes Halliday has been kidnapped because of the salt-sucking lilies, and even when Kingston is nearly shot down on a helicopter flight, he remains dogged in pursuit of his missing friend. Fans of the brave and erudite Kingston will savor his latest breakneck botanical adventure. (May)