Readwise is taking on Kindle and Kobo for ebook supremacy

For the last several years, Readwise has been building tools for power readers.

There's the eponymous product, Readwise, which stores and categorizes your Kindle highlights to help you remember what you've read. There's Readwise Reader, an app for reading newsletters, PDFs, and web articles you've saved for later.

And now there's Readwise Books, a full-fledged […]