Mathlide and the Heroes

Mathlide is a huge book geek, and particularly attached to the Heroes of Olympus series. She's depressed over the loss of her father, which caused her to have to move from Missouri to Denver and to her aunt's house. Her aunt and uncle, who seem to argue one day and love each other the next, don't have time for Mathlide because they are rich and have organizations to run. Her sixth grade year is almost over and she has made no friends. Her only comfort is her books and her imagination, and it bothers her that her father had promised to tell her who her mother was, but never got to. She never knew her mom- until one day when the most unthinkable thing happens and Mathlide finds herself in the world she's always wanted to be in.