A review by makragic
Short Stories from Hogwarts of Heroism, Hardship and Dangerous Hobbies by J.K. Rowling

5.0

These set of stories include biographies about Hogwarts professors: Minerva McGonagall, Remus Lupin and Sybill Trelawney + more information about how does the one become Animagus/Warewolf.
There is also one new character, Silvanus Kettleburn, in Harry Potter series he was just briefly spoken off since Hagrid inherited his spot as a teacher.

All in all, great read.