Here is my copy of the Book End paper.
fyi: Book end paper was the paper glued onto the inside cover of hard covered books.
according to Bileski as printed in the NSSC Catalog.
K. Bileski provides information on these printings:
orange bookend paper was printed July 28, 1938; described yellow in NSSC
green bookend paper was printed Oct. 10, 1938
blue bookend paper was printed Feb. 11, 1939

Trodent