Excellent. The best part, probably because it was the highlight of his career was Kosovo. Jackson explains the tensions and difficulties of that intervention and the subsequent nation building amidst colourful characters including war criminals, trigger happy Americans and Tony Blair.
Some insights to chew on as well. Jackson mentions three times an analogy of the rope, which has multiple strands, which individually may be weak, but together are strong; likewise in nation building, there must be a military, economic, political and a reconstruction strand (and more) in order for efforts not be in vain.
His commentary on the Iraq war was also interesting; he comments that the real problem was not that there was no plan for nation building there, but that those plans were ignored by Donald Rumsfeld and the Pentagon.
The first half of the book was less insightful but still enjoyable. It basically involved reading about him climbing the military ladder with some drama in Northern Ireland.
I gave it four stars just because the second half of the book was markedly better than the first.