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Maths whizz Alice Jones has already cracked a mystery or two. But when a scientist vanishes from a locked room, she faces her toughest case yet. Dr Learner had been working on an invisibility suit, but is wacky science really behind his disappearance? Or is it something more sinister? Fearless Alice won't stop till she knows the truth...
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Alexander Graham Bell led a fascinating life. He was an immigrant, an inventor, a pioneering speech teacher, and a champion of educating the hearing impaired. Bell was raised by a mother who had nearly no hearing, married a deaf woman, and was lifelong friends with Helen Keller. Few people realize that Bell considered his work with the deaf the most important of his life. Quite a statement, considering Bell's inventions ranged from telephony and phonographs...
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