Constraining metrical theory Book

For those of you who don't know I have been having a flare up with the Sojourns syndrome that I have the past few weeks and I've been limiting my screen time. Thank goodness for audiobooks as I must admit I'm a book addict.
I want to say how much I enjoyed listening to Life on earth written and narrated by David Attenborough. I didn't for one minute think it would be as interesting as the TV programs that I watch but it really is. As soon as I finished listening I went back to the beginning and listened again. Truly magical and I'm very tempted to listen again. Their is something about the voice of David Attenborough that brings the book to life. Worthy of far more than five stars.