The second edition of Observing and Measuring Visual Double Stars (2004) is the definitive book for those who are serious about this fascinating aspect of astronomy. It deals with equipment, allowing you to start modestly with commercial or even home-made instruments. The book covers observing methods using binoculars up to advanced instrumentation and techniques, including speckle interferometry. The astronomy of double stars, including orbital calculation, is given its own section. This second edition contains a significant amount of completely new material, inspired by the work done by observers, particularly in the USA, since the first edition was published. This includes the use of the Internet to carry out astrometry, which involves precise astronomical measurement using existing survey plates and films. The new edition also contains an excellent guide to sketching double stars, a topic not previously covered.