The fourth novel in Terry Pratchett and Stephen Baxter's internationally bestselling "Long Earth" series, hailed as "a brilliant science fiction collaboration . . . a love letter to all Pratchett fans, readers, and lovers of wonder everywhere" ( Io9 ). 2045-2059. Human society continues to evolve on Datum Earth, its battered and weary origin planet, as the spread of humanity progresses throughout the many Earths beyond. Lobsang, now an elderly and...