Where do I get a spot of bother?

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Where do I get the e-book "a spot of bother" by Mark Haddon for free and no fees whatsoever. I actually got "The curious incident of the dog in the night time" but getting "a spot of bother" seems impossible at this point because I can't find free books by him. Can anyone please help me? I'm really an inch from losing my mind! Thanks in advanced!