Do You Write in Books?

This is something that I think about often when reading. How many people write in their books? Do you scribble notes to yourself, underline important/quote-worthy passages or do you just highlight words or sections? Does it help you better understand the material? Does it make the entire experience more memorable?

My parents collect rare books, so it has always been an unwritten rule around my house that books should be treated with care and respect…however, I have gone to the dark side. I write in books! I underline, I scribble (although I have extremely neat handwriting, so it really can’t be called scribbling), I highlight (yellow is my color of choice). I like my books to look like a version of my own personal diary. I want to always remember what struck me as poignant. I want to be able to revisit my thoughts and perceptions.

So my question is, “Do you write in books?” If you do, I would love to see snapshots of a page out of your book.