The Looking glass Wars
This book, by Frank Bedor, is about Alyss Heart, the soon to be queen. She is just an innocent little girl that's main focus isn't to be queen but play with her best friend, Dodge. Their innocent playing is cut off by a sudden invasion by Redd, Alyss' aunt. Redd kills everyone in her path including Queen Genevieve. Alyss escapes into the Pool of Tears which takes her and the queen's most skilled guard, Hatter Madigan, into what we know is Earth. Hatter and Alyss are separated and while Alyss tries to establish life in the foreign world, Hatter searches tirelessly, scouring the entire planet in search of the princess.
While they are gone from Wonderland those opposing Queen Redd are getting slaughtered and the rebellion is on a slow decline as Alyss Heart and Hatter Madigan fade into legend. Meanwhile after many years the two are reunited and find a way back to Wonderland. This gives the rebellion hope as she can now start training to be queen. She does and is able to lead the rest of the loyal subjects into battle to regain her queenship.
While they are gone from Wonderland those opposing Queen Redd are getting slaughtered and the rebellion is on a slow decline as Alyss Heart and Hatter Madigan fade into legend. Meanwhile after many years the two are reunited and find a way back to Wonderland. This gives the rebellion hope as she can now start training to be queen. She does and is able to lead the rest of the loyal subjects into battle to regain her queenship.