Hardy Boys #2 House on the Cliff, PC Early Printing (appears to the the 4th printing), listing to #40 on the back, #42 inside.  Picture Cover edition.  Brown multipic enpapers.  Very Good+ book with light scuffing to spine ends and corners.  damage to the corner of the inside cover, Has a child's name written on the first white page. 

Inv: OBC3-2