500,000 CITIx60 City Guides are out there as your inspirational advisor worldwide! To celebrate this memorable episode of the series we have put forward a Milestone Offer — giving out free guides as you buy more to complete your city guide collection. Purchase any three CITIx60 guides from the collection to get the fourth copy at your choice for FREE! Get more free guides as you take more. Promotion period ends on November 17, 2015.