This is a fairly comprehensive quick refernce guide of basically everything you'll ever need to know about the finer points of the Harry Ptter books (and some stuff from the movies as well). Herein, you'll find the members and ages of every student ever mentioned, every Profesor and the subject they teacher, every muggle, squib, Quidditch Player and Death-Eater that J.K Rolwing has ever thrown at you. There's also a section on the spells and what they're used for.