Mitchard's 'Still Summer' plunges into terror By Carol Memmott , USA TODAY Secure your life preserver. Tie yourself to the mast. It's late August, but it's still summer, and Jacquelyn Mitchard is taking you on a thrill ride you won't forget. Mitchard made her mark in the literary world in 1996 whenTheDeep End of the Oceanwas chosen as the first pick for Oprah Winfrey's now-legendary book club. Since then, she has written six other novels, but none...