This was a splendid read! This book gives an in-depth retelling of Strahd's back story, which we first learn in "Vampire of the Mists (Ravenloft #1)". You get to understand Strahd and he becomes even a little bit of a sympathetic character. I think this should be read after a first play through of the "Curse of Strahd" campaign, to avoid spoilers for yourself. But will definitely add some nuance to all the play throughs after!