What the back of the book says
What I thought
...Some of the parchment pages were the color of cream, thick and substantial, made to last many, many lifetimes.  Other pages were thin and desiccated, positively yellow from age, and crackled alarmingly as Van Richten turned them over.  There were no ornate illuminations, no fussy borders, only lines of plain text in hard black ink.  The flowing handwriting was a bit difficult to follow at first; the writer's style of calligraphy had not been in common ust for three hundred years.  No table of contents, but from the dates it looked to be some kind of history.
He turned to the first page and read:
I, Strahd, Lord of Barovia, well aware certain events of my reign have been desparately misunderstood by those who are better at garbling history than recording it, hereby set down an exact record of those events, that the truth may at last be known...
He caught his breath.  By all the good gods, a personal journal?
While I thoroughly enjoyed this book, I couldn't help but feel let down by it as well.  After reading Vampire of the Mists, I expected far more from this novel.  I don't want you to think that this wasn't a good book, because it was.  It's just that it does not come close to matching it's predecessor, Vampire of the Mists.  I would suggest first reading Vampire of the Mists, and if you love Strahd, then continue to read I, Strahd.  If you still haven't had your fill of Strahd, you should check out Tales of Ravenloft, which features a story with Strahd in it.If, however, you did not fall in love with this character, I would recomend that you find another book.