With Vinyl suffering the same fate as The Brink did the same time last year, HBO is in need of more shows to fill its leftover time slots. What better way to do so than with a series that spawned from a book? Deadline reports that Curtis Sittenfeld’s Prep is becoming a series to be written by 30 Rock alum Colleen McGuinness. Game of Thrones producer Carolyn Strauss is coming along as the executive producer. For those of you who haven’t read Prep, the book is about a “Midwestern girl’s coming of age as she navigates an exclusive New England boarding school.”