In Anthony-winner Hart's lively 20th Death on Demand mystery (after 2009's Dare to Die
), more than one death in Broward's Rock, S.C., engages Annie Darling and her husband, Max. First, Click Silvester, a black teenager who hung out at the Haven, a teen activity center, apparently falls to his death from a wooden viewing platform in the woods. Later, someone shoots obnoxious Haven board member Booth Wagner on stage during an outdoor evening benefit for the center. Many had motives for killing Booth, including his stepson, Tim Talbot, who feared and hated him; his wife, Neva, who's curiously unmoved by his death; his former mistress, Jean Hughes, who was terrified of being fired as the Haven's director and becomes police chief Billy Cameron's prime suspect. A group of local ladies, led by mystery writer Emma Clyde, assist Annie and Max in the hunt for the real killer. Well-developed characters and a complex, fast-moving plot make for a satisfying read. (Apr.)