I can just imagine that being a list of books Trixie is supposed to read, reasons dependent on headcanon, and she's freaking out at the sheer numbers of them. I can't see Trixie as being nearly as book-loving as Twilight.
So even though she & Twilie went to the same school, their abilities turned out different. Trixie concentrated on just magic & its properties while Twilight read everything she could get her hooves on & its relation to magic. Cool seeing Trixie in her element!
IMHO it wold be more interestic if her CM would be incomplete. Without the 'trickstery' element. Like she's realy only into magic, as Twi student in alternate dimension or something. Maybe I'm thinking too much.