Grosset & Dunlap.  Copyright 1943.  1945 or 1946 printing. 

#13 in the series.

Very good book.  Wartime paper, but not fragile or brittle.  No writing/marking.  Blue cameo endpapers.

Acceptable dust jacket.  It's intact, but marred by a sticker removal scar on the front, and large chunks missing at both the top and bottom of the spine. There's a strip of tape near the top right of the dust jacket rear, moving slightly onto the top of the jacket spine. It's price-clipped.

Lists to #15, BG's Challenge (1945) at front jacket flap, to Judy Bolton Rainbow Riddle (1946) at rear flap, and to Nancy Drew Quest of the Missing Map (1942) on jacket rear.  Probably a 1945 printing, but if Rainbow Riddle was already published, and not just anticipated as a book "coming soon" to a bookstore near you, it might be a 1946 printing.

Nice book, but price is adjusted due to dust jacket flaws.  Protected in mylar.

BG13R