This set of 3 hardcover books includes #6 "The Secret of Red Gate Farm", #10 "Password to Larkspur Lane", and #24 "The Clue in the Old Album".  The pages, covers and bindings of the 3 books are in excellent condition with the exception of some coloring of pictures in all 3 and some stains on the edges of the pages in "The Clue in the Old Album" (see pictures).