I was a little disappointed with "Chinese Characters",a book by Han Jiantang, who is Professor of Chinese at Tianjin Normal University. The book is full of information about Chinese characters, but unfortunately, it is a little hard to digest at times. The presentation and structure of the text could be improved and the English translation is not always the best. It's a shame because I was really looking forward to reading it. Having said that, if you don't mind spending a bit of time searching for what you are looking for, the book is full of interesting information.