Hey! I see great niche for tools that make simple data collecting & annotating books & note taking, that turns those things into a easy to use, great looking UX/UI workflow. I need such a tool, with browser clipper, and easy book annotating, notetaking and referencing to annotation context. Your app does UX/UI very well and It’s close to what I need, but I lack features of book annotation. Please add it and help us build easy to use PKM workflows 
I think that integrating with expsting tools is good enough, I only want to be albe to go back to context of annotated text from the note and annotation I’ve taken easily and that’s it. I’ve found out that Calibre reader has very nice markdown export options and fits my workflow well
also hypothes.is is a very nice option