Minerva McGonagall was one of only a handful of people who knew, or suspected, how dreadful a moment it was for Albus Dumbledore when, in 1945, he made the decision to confront and defeat the Dark wizard Gellert Grindelwald.
-- J.K. Rowling (PmP)
PmP is a collection of three e-books, collectively entitled Pottermore Presents.
The e-books contain writings by Rowling also available on the Pottermore website, with a few odds and ends of new information. The most extensive additions are new writings about Animagi and Horace Slughorn, with a few extra paragraphs about Minerva McGonagall.
The titles of the e-books are:
Pottermore Presents: Hogwarts: An Incomplete and Unreliable Guide
Pottermore Presents: Short Stories from Hogwarts of Heroism, Hardship and Dangerous Hobbies
Pottermore Presents: Short Stories from Hogwarts of Power, Politics and Pesky Poltergeists
From the Web
Tumbler (JonSnowWhite): Animagi by J K Rowling
- The changes in Pottermore Presents
- Minerva McGonagall by J K Rowling
- Horace Slughorn by J K Rowling
Harry Potter Wiki: Pottermore Presents
WizardingWorld (Pottermore) news feature: How Pottermore concocted Pottermore Presents
Besides the new writing about Animagi and Professor Slughorn, and several new paragraphs about Professor McGonagall, additional paragraphs or sentences were included in the entries for:
As of early February 2021: