D&D Beyond Marketplace [dndbeyond.com]
For a limited time, use code
NOTTHROWINGAWAY for 25% off individual books or
MYSHOTATLEGENDARY for $170 off the Legendary Bundle!
Discounts applies at checkout.
This is for DIGITAL copies of the books and adventures for use with the D&D Beyond app on your phone, computer or tablet. If you are tired of pen and paper you can have your character sheets, reference books and everything else you need to play on your phone, tablet or computer. D&D Beyond has a nice character and encounter generator as well. They are working on adding a digital dice roller too.
I've got my hard copy books but barely crack them open anymore and just use my phone or computer when I play.