The Penny Parker Mystery Series Volume II by Mildred A. Wirt

THE PENNY PARKER MYSTERY SERIES Volume II contains the final seven books in Mildred A. Wirt's popular detective stories for girls series. Includes an active table of contents for easy navigation.

Hoofbeats on the Turnpike (#11)
Voice from the Cave (#12)
Guilt of the Brass Thieves (#13)
Signal in the Dark (#14)
Whispering Walls (#15)
Swamp Island (#16)
The Cry at Midnight (#17)