The Castle Sisters and the Impossible Darkness (The Castle Sisters Complete Volume 1)    by Jason Krumbine
Price: $7.99 USD. 113620 words. Language: English. Published on November 15, 2012. Fiction » Children’s books » Readers / Chapter Books.
The forces of darkness are gathering and the battle between good and evil has reached a pivotal turning point. When their Uncle gets kidnapped by the evil Agent Dark and the mysterious organization known only as the Tancredi Group, the Castle Sisters find themselves in the middle of that very battle.