The Vault of Larin Karr is a great product. It is the quintessential sandbox campaign setting, with every single location (above and underground) connecting together with a loose story tying them all into one awesome adventure module. A great model of what a real sandbox campaign should look like! Check it out!

Monte Cook used to be my favorite D&D author, but Bill Webb has taken his place. This is a great adventure, and a logical continuation from The Lost City of Barakus. There are plenty of 'hooks' for players, and enough detail to make running the adventures a cinch.