This enterprising book was intended as a practical guide to wind-energy generators up to 100 kW rated capacity. Very small machines such as battery chargers are included, though the main emphasis is on the 20 kW to 100 kW range. Wind-energy conversion systems are being purchased in increasing numbers in the UK. At the time of publication, they were used mainly in remote and island installations (especially on farms) to reduce dependence on conventional fuels such as oil and bottled gas. But the book was not just a practical handbook for those who already had a machine; it supplied sufficient information to allow potential purchasers to decide whether the installation of such a generator would be cost-effective in their own particular circumstances.