Pinyin
Romanisation method for Chinese, now universal for People's Republic of China. It is also the most widely used method of romanization outside of PRC.
gimpf: Is Wade-Giles anywhere else but in Taiwan of China used anymore?
TDerz For character search for Go books
http://zhongwen.com/zi.htm could be useful. If you know how to look up radicals, hanzi and Kanji - and you should know on this site too - then a book could provide a faster result (if at hand). The website provides English-, pinyin-, Cantonese, stroke number- and character-look-up.