Carol Wall, author of the acclaimed "Mister Owita's Guide to Gardening: How I Learned the Unexpected Joy of a Green Thumb and an Open Heart," will be at South County Library at 3:00 p.m. on Saturday, May 31 for an author talk and book signing. Mister Owita's Guide to Gardening is one of 15 books on Oprah's list of "books every joy-seeking woman needs to read." Barnes & Noble will have copies of the book for sale at the event.