With the rise of multiple new insurgent UK parties, this is a timely read indeed. I'd heard and read about this book for years (and the generous praise that usually accompanied it), but could never muster up the interest to actually find a copy and read it. Turns out -- it's worth it, and the praise is warranted.
I'm not sure there's a better, more instructive book on the flows and spasms of UK politics in the 80s. By charting the cradle-to-grave story of an entire political party, you get a satisfying and insightful narrative -- along with enough critical distance to make the analysis feel worthwhile. The writing is lively, and the authors have both a journalist's grasp of characterization and academic's knack for incisive study. If there's any flaw, it's the book pauses mid-narrative for a very boring examination of the party's structure, membership, and constitution -- such dry matters should have been left to an appendix, and not jammed in the middle of the book!