Clocksin & Mellish has the benefit of being a slim volume, which makes it approachable.

Sterling & Shapiro (Art of Prolog) has much more depth. Not sure I'd recommend to a beginner. (It has a beautiful cover, though and is almost worth getting just for that.)

My favorite Prolog book is Pereira & Sheiber's "Prolog and Natural-Language Analysis". It's slanted toward NLP but the coverage of Prolog itself is top notch.

https://www.amazon.com/Natural-Language-Analysis-Information...