H. John Edwards, 1958? Series
 
Cover for Treasure Trove (H. John Edwards, 1958 ? series) #2
Cover for Treasure Trove (H. John Edwards, 1958 ? series) #6
Cover for Treasure Trove (H. John Edwards, 1958 ? series) #9
Cover for Treasure Trove (H. John Edwards, 1958 ? series) #15