The Secret Diary of Laura Palmer

According to my good friend Wikipedia, lots of booksellers refused to stock The Secret Diary of Laura Palmer  due to its graphic content.  I've read dirtier things, but Laura's frank use of drugs and the detached way she describes her sexual encounters is definitely unsettling.  It's easier to stomach if you can forget the fact that this is NOT the diary of a teenaged girl.

Well, I was in my 20s when Twin Peaks was filmed.

Diary begins on the day of Laura's twelfth birthday.  Spoiler:  The diary is a birthday gift.  Laura describes her life as idyllic, only vaguely hinting at the malevolence that lies beneath the surface of her picture-perfect life. At first it's hard to feel pity for her.  I mean, damn, she gets a pony for her birthday.  A freaking pony!  Want to know what I got when I turned 12?  I can't remember because it wasn't a damn pony.
**If you've never seen Twin Peaks from beginning to end, stop reading NOW!**
It doesn't take long to get to the juicy bits of the diary when we are made privy to little Laura's *ahem* solo bedtime activities.  Laura also begins to admit that she has been visited by the mysterious killer BOB for several years and she is never sure whether he is real or simply a horrifying recurring nightmare.
Diary drags you through the muck and mire of Laura's double life.  Straight-A homecoming queen by day, cocaine-fueled sex toy by night.  The diary becomes harder to comprehend as cocaine and BOB's madness begin to saturate its pages.  Laura's frantic desperation is almost palpable as the book winds down to its ultimate conclusion... Laura's death.
If you're anything like me and need to read or watch anything Twin Peaks-related you can get your hands on, you should definitely find yourself a copy of The Secret Diary of Laura Palmer.  The book is a sort of sequel to Twin Peaks and the later events coincide with those from the movie Fire Walk With Me. (It even notes where pages are missing, keeping in line with FWWM.) 

Here is a list of other Twin Peaks reading material to satisfy your curiosity.