In Ridley Pearson’s fourth installment of the Risk Agent series, White Bone (G.P. Putnam’s Sons), when Grace Chu vanishes in her attempt to investigate a switched vaccine in Kenya, John Knox encounters savage elephant poachers and their terrorist sponsors in his efforts to follow her trail. Among the Living by Jonathan Rabb is a moving novel about a Holocaust survivor’s unconventional journey back to a new normal in 1940s Savannah, Georgia.