What's the Name of That Book??? discussion

This topic is about
Into the Dark
SOLVED: Children's/YA
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SOLVED. Children's Fantasy book. Protagonist was a blind boy called Matthew. [s]
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Read in 2014-2016 in Britain, the book seemed older- maybe 1990s or early 2000s? I think the cover was blue with Matthew on the front, maybe with images of
sound waves or something?
Thanks and apologies for vague description!