Mystery of the Empty House
by Dorothy Sterling | 
The Bobbsey Twins on the Deep Blue Sea
by Laura Lee Hope | 
The Bobbsey Twins at the Seashore
by Laura Lee Hope | 
The Mysterious Disappearance of Leon
by Ellen Raskin | 
The Long Secret
by Louise Fitzhugh | 
The Happy Hollisters
by Jerry West | 
Goody Hall
by Natalie Babbitt | 
The Treasure of Alpheus Winterborn
by John Bellairs |
The Mystery of the Pantomime Cat
by Enid Blyton |
Mystery of the Strange Bundle
by Enid Blyton |
The Mystery of the Missing Man
by Enid Blyton | 
The Tattooed Potato and Other Clues
by Ellen Raskin | 
The Famous Stanley Kidnapping Case
by Zilpha Keatley Snyder |
The Mystery of the Missing Necklace
by Enid Blyton |
The Mystery of the Dead Man's Riddle
by William Arden |
The Happy Hollisters on a River Trip
by Jerry West | 
Five on a Treasure Island
by Enid Blyton |
Minnow on the Say
by Philippa Pearce | 
Blue Bay Mystery
by Gertrude Chandler Warner |
Bus Station Mystery
by Gertrude Chandler Warner |
