Green, John, 1977- Turtles all the way down / John Green. - London Penguin Books 2017 - 304 p. 22.2 cm ISBN: 9780241335437 (hbk.) : No price Nat. Bib. No.: GBB7D5433 bnb Nat. Bib. Agency Control No.: 018458412 Uk Index Terms--Genre/Form: Young adult fiction. Dewey Class. No.: F GRE/O