In his inimitable, easy-going style, Patrick Moore describes Mercury. In doing so he has written the most up-to-date book about Mercury for amateur astronomers. Moore writes of the professional astronomers who have observed the planet over the centuries, amateur observations, and the past, present and future space missions to this extraordinary world. Mercury is one of the more difficult objects for amateur astronomers to observe because of its close proximity to the Sun. For the same reason, it is also one of the most fascinating and strange planets. Amateur astronomers can see Mercury and its ever-changing phases all year, and sometimes watch it transit the Sun – the next transit is in November 2006, followed by one in May 2016.