This one is a bit of a tricky one, but I'm going to give it three stars, based on a combiantion of different things:
1) Books about Contemporary* Art are always tricky, as the genre is fluid and changes rapidly. A 30-year-old book is always going to seem dated as styles go in and out of fashion. Despite this, the book holds together well. 3.5/5 (* I hate this term. Contemporary art should mean art that was occurring at the same time as something was happening, not to "present day" art).
2) The installations covered in this book are excellent and well presented, and the small write-ups on each piece are good. 4.5/5
3) The essay that introduces the book is poor. There is information here, but you've got to head into the verbiage with a machete to find it. As someone who works as an arts reviewer and critic, I recognise impenetrable art wank, and always think that art should be explained in an engaging and enthusiastic way. The writing here makes it feel like anyone who has not done a university course on the philosophy of art is not worthy. 1/5