Book excerpt: We�ve all heard of Alexander Graham Bell and Thomas Edison, but very few female inventors are household names. This fascinating book illuminates the history of women who used their brainpower and skills to produce important items we use ever day. Meet Hedy LaMarr, a famous Hollywood actress by day and inventor of a radio guidance system for torpedos by night. Marvel at the cleverness of Ng Mui, who developed the martial art known as Wing Chun which later developed into kung fu.