Good reference material for the MX5 is difficult to come by, this tatty little book does not make much progress towards that goal. I was bought up on Haynes manuals, the old hardback reference books that were actually quite usable, this book is a pale imitation of what Haynes used to be. It is based on the strip down of a 1996 American Miata, the basic text and pictures are 13 years old with a superficial update in 2010 for the later models. All measurements are in imperial, keep your conversion charts to hand, the pictures are a mish match of earlier and later American models.
It's given me the torque settings that I needed, a few pictures that have clarified things, but if you're expecting a definitive reference then you will be disappointed. It is printed on the cheapest, nastiest paper you will ever come across, treat it with extreme care and don't take it anywhere near a workshop. If I had paid a fiver for it then I would have been happy, it's worth about that at a push, but having seen it I am now feeling ripped off by Haynes. It's better than nothing, but not by much and nowhere near what a workshop manual should be.