THE MYSTERY OF BLUE MINES

The blue mountain

Meir Shalev

Gold robbery and mine mystery

Richard Musman

The Smugglers' mine

Chris Mould

Burried

Robin Merrow Maccready

THE MISSING COINS

John Escott

Discovery in the Cave

Mark Dubowski

BLUE HEAVEN

ELAINE KAGAN

Blue smoke and murder

Elizabeth Lowell

Mystery of the disappearing dogs

Barbara Brenner

Adventure on the island

William Murray

Blue Moon valley

Stephen Rabley

Hunting for hidden gold

Franklin W Dixon

The mystery of the chinese junk

Franklin W Dixon

Mystery at the Spanish Castle

Ruth Nulton Moore

The mysterious island

Jules Verne

BLUE MINES

Kris Anderson

STORIES OF DETECTION AND MYSTERY

What a place to hide!

Jennifer Courtney

The Cave of Mysteries

Ilay Peled