Assassination Classroom, Vol. 20

What does a pathetic class of misfits have in their arsenal to combat their schoolteacher's alien technology, bizarre powers and...tentacles?! The battle for Koro Sensei's life against a multinational operation's soldiers and weaponry is difficult enough, but now his creator and former protégé, mad scientist Yanagisawa and Grim Reaper II, join the battle to destroy him—and they've both had major enhancements! But the stakes abruptly change when a 3-E student is fatally caught in the crossfire... If there's one thing that enrages 3-E's teacher, it's harming—let alone killing—his students! Koro Sensei's fury and ingenuity know no bounds, even as fate inexorably catches up to him... The surprise-hit bizarre action comedy about a tentacled teacher with a heart that is a consistent Bookscan best seller.  

Ideal for readers interested in manga.