The iPad app for my book, Graph Theory, now offers annotations: you can scribble in the margins, mark text, add typed text fields and so on. The annotations can be saved and synced between devices via iCloud.
This is a major overhaul of the software, and I'd be very grateful for any feedback you might have. The app itself is free, and the sample chapter that comes with it has all the annotation tools installed. Please try it out and let me know what you think...
For more info, see http://diestel-graph-theory.com. The direct link to the app is
https://itunes.apple.com/app/graph-theory-by-reinhard-diestel/id614583848?
Thank you! Reinhard Diestel
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