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There are no app[s] like that at the moment but you could try to make it one, it sounds an useful idea to me. In the meanwhile, it's not 100% what you are requesting but it could work: Browse http://www.stackprinter.com/favorites?service=stackoverflow&userid=470933&page=1 Print every questions in Pdf (I can do this natively on Osx, you may require ...
My app converts all the questions based on a keyword into a single pdf. When little mods, you can make it behave your way.
This app can help you in some way. Create some pdf's on the topics you're interested in and off you go.
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