"Of course it's a good plan. All my plans are good."

Ruby Callahan can't deny that life since finding her family—part of her family—has been an epic roller coaster. But she won't slow down until she locates her long-missing parents, even if it means putting herself and everyone around her in danger. But Ruby's focus shifts when the new girl in her apartment building threatens her friendship with her only true friend.

Distracted and disillusioned by Winston's fickle friendship, she sets out alone on increasingly reckless missions to find the Dark Diamond—and important clues.

When Ruby warns Winston that the new girl isn't what she seems, his angry response puts them both in danger.

Can they save themselves or will they, along with the Dark Diamond, be lost to history?A heart-pounding adventure with a touch of magic, this continuation of The Solomon Stone is perfect for fans of The Mysterious Benedict Society and The 39 Clues. Grab your copy today!