Bestseller Clark (Where Are the Children?
) spins yet another imaginative tale of murder and deceit. Every Mother’s Day over the 10 years since Charles “Mack” MacKenzie Jr. disappeared from Columbia University just before his graduation, Mack has phoned his mother in Manhattan to let her know he’s all right, but otherwise reveals nothing. In the meantime, Mack’s lawyer father has perished in the 9/11 tragedy. Now Mack’s younger sister, Carolyn, a graduate of Columbia and Duke Law School, where Mack was intending to go, tells him during his annual call that she’s going to find him. When a note from Mack turns up in the collection plate at St. Francis church, asking Father Devon MacKenzie, his uncle, to tell Carolyn not to look for him, she becomes even more determined to do so. Based on a real story, as Clark notes in her acknowledgments, this novel of suspense will keep readers guessing to the nail-biting conclusion. (Apr.)