There is not much that I can add what has not already been said. The 'solution' is fairly simple. Use another font or adapt the font to follow normal typesetting rules and put the correct characters in the correct place. That is quite an important point in a font, that characters have their fixed place...
If you don't knowhow, I would recommend to ask the author of the font. This will bite you in the future, potentially even in such a way that you need to redo everything.
Also, this relative small change will allow you to make the book readable on much more readers and potential readers. It is not about the money, it is about sharing knowledge and reading pleasure.
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