I'm quite engrossed in...

Meaning

I'm deeply involved and fascinated by something.

Examples

• John: I haven't seen you all day. What have you been up to?
• Alice: <b>I'm quite engrossed in</b> this new novel; it's utterly captivating.
• John: Oh? What's it about?
• Alice: It's a historical mystery. I've completely lost track of time! I <b>am quite engrossed in</b> it.