Book ReviewsGeneral Non-Fiction Cosmos: Possible Worlds Book Tour by Katie October 26, 2020 by Katie October 26, 2020 Ann Druyan’s Cosmos: Possible Worlds is a companion book to the National Geographic Cosmos series, and picks up on the work of the author’s late husband, Carl Sagan and the first Cosmos series. Starting with the 1939 World’s Fair, Druyan …