Short, to-the-point and sweetly nostalgic! "Short Stories from Hogwarts of Heroism, Hardship and Dangerous Hobbies" is a fun read. It is the first of a 3 book series that gathers all the tidbits of "new" information about the Wizarding World that J. K. Rowling released through the Pottermore portal.
I could never get into that Pottermore universe much. It felt like one of those obvious cash-grabs, a feeble attempt to keep people hooked-on via a badly designed web interface. But anyhoo, the one good thing to come out of this is the official release of the material that JKR could not include in the books.
This booklet has fully developed back stories of characters that are not exactly "central" to the Harry Potter plot but are pretty important for the whole story as such. There are stories about Prof. Mcgonagall, Remus Lupin, Sybill Trelawney and a fourth new character. And the best part - these stories are written by JKR herself, no proxy or anything like that - you can tell from the writing - feels like vintage JKR.
All in all, a surprisingly quick read but entertaining nonetheless ! Give it a go. 4/5