The Glen Arbor Arts Center will host Brittany Cavallaro, author of seven Young Adult (YA) novels, will speak May 18 as part of the GAAC “Coffee with the Authors” program.Cavallaro will explained this stand-alone genre, and how she approaches it. Cavallaro is a creative writing instructor at the Interlochen Arts Academy, her alma mater. Her New York Times bestselling “Charlotte Holmes” series is…