M. Sohaib Ali Siddiqui - Thank you for your question. I was hoping you could have a look at my book titled Navigating Problem-Based Learning. It is written for students, but many facilitators and teachers emailed me, saying it was useful to them to improve their small group teaching and facilitation skills.
I enclose a link below; also, I look forward to receiving your feedback and comments.
It's very old now but when i started teaching 40 years ago I loved Michael Marland's The Craft of the Classroom - https://www.amazon.co.uk/Craft-Classroom-Mr-Michael-Marland/dp/0435806092