At 71 pages, this was a quick read and a nice little jump back into Harry Potter's world. I realize Rowling has to move on from Potter (and her Cormoran Strike series is a wonderful road to take) but I do appreciate that she came back for a few to give us 3 short e-books.
E-book number one covers the backgrounds of Minerva McGonagall, Remus Lupin, Sybill Trelawney and Silvanus Kettleburn. We also get sidenotes on Animagi, Werewolves and Naming Seers.
I've missed these characters so I was happy to get a little more background on them. Note that this isn't a story, just biographical information. I think Potter fans will be happy with it!