Bruce MacEvoy is a Fellow of the Royal Astronomical Society and member of the Astronomical Society of the Pacific. A lifelong astronomer and member of the Sonoma County Astronomical Society, he has studied double stars intensively since 2006. He has lectured on double star astronomy in California and Hawaii, developed database software to edit the Washington Double Star Catalog, and has observed over 5,300 double star systems from his observatory near Sebastopol, California. He was formerly a senior research psychologist with SRI International and Director of Research for Yahoo! He also curates one of the largest websites devoted to astronomical topics, www.handprint.com/ASTRO/. Wil Tirion is a full-time uranographer. He is famous among the amateur astronomy community for the numerous atlases and star charts he has created. Among his other successful books for Cambridge University Press are Sky Atlas 2000.0 (co-published with Sky Publishing), The Cambridge Star Atlas, The Monthly Sky Guide, and A Walk Through the Heavens. A full list of Wil Tirion's publications are available on his website: www.wil-tirion.com.