Trivia from Perks of Being a Wallflower

So while my nearby towns are being evacuated because of an out-of-control bushfire and the sky outside turns darker thanks to a combination of smoke and cloud, I thought it would be cool to share a fun fact I learned watching The Perk's of Being A Wallflower. Mr Anderson asks the class some a trivia question, and gives a few hints. Protagonist Charlie silently writes down the correct answer while the rest of his classmates shout out everything but.

I'll turn it into a Who Am I?

Who Am I?
I am a British author.
I invented the Paperback novel.
I also invented the serial.
At the end of the third chapter of my first novel, I had a man hanging from a cliff by his fingernails, hence the term 'cliffhanger'.

Who am I?

Leave your guess in the comments, the answer will be revealed next blog-post.

NO GOOGLING!

- Bonnee.