11. Several of Barrows'major conclusions are heavily questioned in the course of Nicholson Baker's book Double Fold . 12. The fissures are double folds of pleura that section the lungs and help in their expansion. 13. Double fold one end to seal.14. So says the novelist and essayist Nicholson Baker in his impassioned and compelling new book, " Double Fold ." 15. Fabricated geomembranes can be accordion folded or rolled up to facilitate deployment and reduce double folds as shown in photographs. 16. "Double Fold " takes its name from the brittleness test that librarians applied to old newspapers, folding a corner back and forth. 17. The title of the book, " Double Fold " comes from a test librarians used to see if a book were worth saving. 18. She appears briefly in the " Argonautica ", giving her brother Acastus a mantle of double fold before he sails off with the Argonauts. 19. At Le Cirque, Boulud required chefs to button their jackets and tie their aprons with a double fold at the top, just as he did. 20. Baker also wrote the nonfiction " Double Fold : Libraries and the Assault on Paper, " a National Book Critics Circle prize winner in 2002.