These 4 Nancy Drew books written by the fictitious "Carolyn Keene" and published by Grosset & Dunlap are hardcover with size about 7-1/2x5x3/4 and binding typical of the 1950-60s series books like Nancy Drew, Dana Girls, Tom Swift, and Hardy Boys.  The textured covers like these were replaced with shiny covers in the late 1960-70s.  Most have copyright dates, not necessarily publication dates.

These 4 books are:

# 2 - The Hidden Staircase - 1959 - 182 pages.  Some wear to the cover.

# 22 - The Clue in the Crumbling Wall - 1945 - 217 pages - illustrated by R. H. Tandy

# 31 - The Ringmaster's Secret - 1953 - 214 pages.  Damage to upper left-hand corner of front cover as shown in photo.

# 35 - The Haunted Showboat - 1957 - 184 pages.  

All 4 books are in good vintage condition for books over 50 years old (see above details for each book) - cover color is bright; no writing or tears inside or on pages.

Ships USPS Media Mail - unless buyer specifies and pays for another shipping method.