NEW YORK—"Fifty Shades of Grey" author E L James will soon make her first visits to two hotspots featured in her erotic trilogy: Seattle and Portland.

Vintage Books announced Thursday that the Britain-based writer is including the two U.S. Pacific Northwest cities on a tour this fall to promote her multimillion-selling novels. James will appear at Seattle's Third Place Books on Sept. 22 and at Portland's Powell's Books on Sept. 24.

James will also travel to Houston, Minneapolis, San Francisco and Los Angeles.