This recently released tiny book called  “The Otaku Encyclopedia” by Patrick W. Galbraith is probably the best english source for anyone trying to find out more about Otaku culture. Its small but has 248 pages full of japanese pop culture knowledge, so if you dont know what “Otaku” means you just go to the letter O and there you go “a nerd, geek or fanboy…”, its a must get for anyone who is interested in japanese pop culture!