Books with title The Mystery of the Hidden Key

“Be careful who you love, it just might kill you.” When Sera’s father is killed in a horrific accident, all he leaves behind is a mysterious key. Sera places the key on a chain around her neck and vows to avenge her father. Strange characters arrive in town including the otherworldly Night Angels, who claim to be sent for her protection. Sera falls hard for one of them—exotic, arrogant Peter. But what if his promise of love is only a ruse to gain access to the key? As Sera’s connection to the key grows, so do her supernatural powers. Guided by clues left by her father, Sera searches for the hidden chamber beneath the city, hoping to save what lies within before the sinister mayor and his deadly followers drown humanity in a bloodbath.

THE MYSTERY OF THE KEY TO HEAVEN (OUT-OF-BODY TRAVEL): This Is the story of a young girl whose mother has died. Returning to her in a hailstorm of light for night passage, the mother takes her daughter on a journey to find the Key to Heaven. Traveling to the Dead Sea, she meets with the prophets of old to pick up pieces of this key before she meets the one who holds the final key, Our Lord Jesus Christ. (For more info- www.outofbodytravel.org)

It was a miracle. Penny's aunt was kidnapped, taken to the woods, and then miraculously saved by an unseen, hidden archer. The only clue to his identity was a handmade arrow. Eleven-year-old Penny and her friend, Chad, determine to get to the bottom of the mystery.Chad and Penny are members of Earthkeepers, a club of concerned kids trying to do their part to clean up the environment. They're in the north woods of Minnesota to plant trees -- supposedly. In a well-hidden cave they find a coffee can full of newspaper clippings that seem only to raise more questions. Maybe the mysterious stranger is no angel after all! And maybe Penny and Chad shouldn't be out in the woods!Especially since they're increasingly certain they are not alone...

The Aldens find a mysterious painting hidden in the attic. The children learn that it is a portrait of their grandmother, whom they never knew, wearing the necklace Grandfather gave her when they were married. The necklace disappeared on their first anniversary — and was never found. Can the Boxcar Children track down a necklace missing for so many years?