Starwood is partnering with Offbeat Guides to provide complimentary travel guides.
This Flyertalk thread suggests it is for people who have earned free weekend nights from the current promotion, and it’s suggested you’re supposed to get one free guide for each free night earned. But in fact once you enter a Starwood number, anyone can customize and email themselves a .pdf travel guide. And in fact the link doesn’t appear to say it’s limited to anyone in particular.
You’re asked for your Starwood member number, then your destination and origin cities. It’ll ask for your travel dates in order to customize your guide based on specific events during your travels. And then you have the option to specify the Starwood property you’re staying at, but you can leave that blank.
Then you’ll be e-mailed a .pdf customized travel guide for your destination.