Big/Better Little Books, and a handful of imitators:
Better Little Books Apple Mary and Dennie's Luck Apples (Whitman 1939)
Better Little Books Dirigible-ZR90 and the Disappearing Zeppelin (Whitman 1941)
Dixie Dugan and Cuddles (Saalfield 1940)
Better Little Book George O'Brien and the Hooded Riders (Whitman 1940)
Gulliver's Travels (Saalfield 1939)
Better Little Book Harold Teen Swinging at the Sugar Bowl (Whitman 1939)
Better Little Books Uncle Sam's Sky Defenders (Whitman 1941)
Books have remarkably intact binding - the thickness of the boogs relative to their height and width usually works against that. All have light to moderate corner and edge wear to the covers with Light Tan to Cream pages