Mystery writer J.A. Jance was set to sign copies of her 50th book, "Moving Target," at 5 p.m. today at Costco, 6255 E. Grant Road. But the expected shipment of books never arrived, so the event has been cancelled.

You can still catch Jance, however. Other book signings:

7 p.m. today — Barnes & Noble, 5130 E. Broadway, 512-1166.

11 a.m. Thursday — Joyner-Green Valley Branch Library, 601 N. La Cañada Drive, Green Valley. Tickets are required and may be picked up at the library in advance, 594-5295.