It is rather strange how differently comics are seen in different countries, in Japan and continental Europe comics are for children AND adults but the main image of comics in the USA and UK (And Iceland too) is that it is just crap for kids, but thankfully things are sloooooovly changing thanks too more and better comics for the adult market (and I'm Not talking about X-rated comix here) and books like this by Roger Sabin which is an excelent introduction to this genre.
His book start with a general intoduction and definiton of comics and some general terms then in part one he focuses on Britain, part two is about the United States and part three is about different aspects like Women in comics, world comics and comics and the media.
The book is informative, interesting and great fun too read, I would also like to recomend another book by Sabin which could be seen as a companion volume to this one, a coffe table book called Comics, Comix & Graphic Novels, A history of Comic Art, full of colour illustrations and interesting articles.
Great Fun For Grownups.