What is the narrator point of view in the book, We Love You, Charlie Freeman: A Novel?

Kaitlyn Greenidge tells her novel, We Love You, Charlie Freeman, from both the first and third-person narrative modes, alternating between modes based on chapters. The first-person narrators of the novel consist of Charlotte and Ellen. The third-person narrator consists of an unidentified storyteller who gives readers intimate insight into the thoughts, feelings, and private actions of characters other than Ellen and Charlotte, who would not be privy to the same information about the other characters communicated to the reader by the third-person narrator.