Most textbooks today are available electronically, but the MAJOR shortfall is the inability to easily annotate or take notes on them, specifically handwritten ones. Most readers are using not desktops/laptops, but tablets and phones with touch displays. Research shows better learning retention with handwritten over typed notes. If Goodnotes could truly allow this handwritten annotation function somehow, especially in Kindle app which we ALL have and use. Either a way to drag a Kindle book into the Goodnotes app, or an app extension for Kindle. Besides, what a better company to partner with like Amazon. Both companies would win as this would add value to both products.