If you’ve got a Wizards Play store nearby (basically any non-corporate-run game store), head down and pick up Tomb of Annihilation. Not sure if you’ve got one nearby? Use Wizards’ handy store tracker to see. Or just call around. Most game shops are.
I picked up my copy yesterday from Around the Table Game Pub. I’ve only gotten the chance to read about a page or two of it, but it’s looking fantastic.