The Mysterious Messenger by Gilbert Ford

Maria is actually a psychic while her mother pretends to be one.  It's when she steals a ring from an old lady that Marie has Edward telling her to help the old woman.  He even gives her hints on how.

Henry Holt and Co. (BYR) and Edelweiss allowed me to read this book for review (thank you).  It will be published July 21st.

Her mother watches her like a hawk.  Her only freedom is to go to the library and bring home some books to read.  She says she's going to the library and follows the old lady home.  She gives her the message from the ghost.  It starts a beautiful friendship.

Then she meets Sebastian in the library and learns he lives above her in the other apartment.  She wouldn't be allowed to play with him, so she keeps him secret.  Then she finds he's following her everywhere.  She gets angry and tells him he's no friend of hers.

Her life gets more difficult when the librarian come to see her.  She gets accused of telling them about her mother's scam.  She also finds out that she isn't really her mother.

She sneaks out the window and hides with Sebastian.  They leave without her so she goes back for the few belongings she had.  Madam Destine is waiting for her.  She tries to force her in the van but the librarian and the police are there.  Who will win this argument?