Mazda MX-5 Miata 1990 Thru 2014 Haynes Repair Manual : Does Not Include Information Specific to Turbocharged Models by Editors of Haynes Manuals (2015, Trade Paperback)
I had the manual for the MK1 and it's about as much use for the MK3 as this is. Most of the time when talking of the MK3 they use MK1 pictures and say 'something like this' which is often as similar as a Leyland bus. It is essentially the MK1 manual with additions for the MK3 such as torque settings and fluid quantities. It really was of no real use to me. I have to use the internet instead.
There is good information and explanations, but I don't think it's very complete. Some information is not correct, eg. the maintenance period of the MX5. The manual claims that you should change the oil, filter etc, on extremely short intervals like 6 months, which is incorrect.