Teen paperback series, routinely castigated or ignored by Young Adult librarians despite their popularity with young adults, should be considered for inclusion in collections alongside other genres. In Serious about Series, Makowksi provides distinct criteria by which these series can be judged for quality within their genre, and emphasizes them as an inexpensive way to fulfill patron needs and increase circulation by bringing young people, often considered "non-readers," into the library. Makowski's book is an insightful evaluation of over fifty popular series, and includes an introduction that analyzes the teen series paperback genre and its significance for both teen reading practices and library services. Hundreds of titles are annotated in the book, allowing librarians to develop "in-house" bibliographies of favorite teen series titles, making this a truly useful reference source for the young adult librarian.