In Yusei Matsui's 'Assassination Classroom,' students in a bottom-of-the-barrel class are tasked with assassinating their teacher, a space alien who has threatened to destroy the earth. The series is both a great shonen manga and a great sendup of shonen manga, and for those who want to binge on it, VIZ Media has collected all 21 volumes in the 'Assassination Classroom Box Set,' which includes an extra 'yearbook,' with images of the characters that were not included in the previous English-language editions. ($189.99)