GEMS—Electronic label Dropping Gems is hosting a free showcase with 10 of their artists, proving just how creative and vital the collective is to Portland music. Find out for yourself as the likes of Natasha Kmeto, Devonwho, the Great Mundane, and a healthy host of others drop killer beats on the crowd. NL
Holocene, 1001 SE Morrison, 8:30 pm, FREE

THE WRATH OF ZAHN—After single-handedly bringing Star Wars back to life in the early '90s, fan-favorite author (and Oregonian) Timothy Zahn has earned a whole lot more respect than George Lucas. His latest, Scoundrels, is basically Ocean's Eleven... but starring Han Solo, Chewbacca, and Lando Calrissian. BONUS! Nerds will be here in Star Wars costumes! Probably. EH
Powell's Books at Cedar Hills Crossing, 3415 SW Cedar Hills, Beaverton, 7 pm, FREE