The Enigma Diaries: Hidden History (Enigma Diaries #1)

When history hides the most dangerous of secrets, no one is ready for the arrival of the Nephilim and the destruction they bring. But there is one Lady who will meet the threat and use the Nephilim’s own Time Device to stop them. To do this she must first steal the Time Device and will recruit the most unlikely person to do it. Fourteen year old Cassandra Jessica Reid floats along, shunned and tormented at school. With only a coded diary for company, Cassandra spends her time imagining another world. Then everything changes when she discovers a golden glimmer in the corner of the school quadrangle. After being transported to another place, Cassandra and her new friends must prepare to meet the mysterious Lady-Who-Knows-All and uncover the hidden past while navigating an enigmatic time paradox.