I'm utterly captivated by...

Meaning

I'm completely fascinated by...

Examples

• John: What are you reading these days?
• Alice: This new biography. <b>I'm utterly captivated by</b> the author's life story.
• John: Oh really? Sounds interesting.
• Alice: It is! The details are incredible. <b>I'm utterly captivated by</b> every chapter.