Join best-selling author Rick Riordan for a discussion of "The Red Pyramid" and Egyptian mythology, as well as a book-signing, at Barnes & Noble La Cantera, 15900 La Cantera Parkway, at 2 p.m. May 15.

Ancient Egyptian gods and goddesses provide the names of the 19 regions on Comet 67P — a scientist with the mission talks about how they were chosen.