Barnes & Noble has entered the cloud-based reading business with the launch of Nook for Web. The new platform works with all PC and Mac browsers and B&N said it will add support for tablets, smartphones and other mobile devices in the fall.

To promote the rollout, B&N is making six titles available for free through July 26--Map of Bones by James Rollins, Sex and the City by Candace Bushnell, The Vow by Kim Carpenter, The Boxcar Children Summer Special by Gertrude Chandler Warner, Brave by Tennant Redbank and Perfect Island Getaways by Patricia Schultz.

Amazon began its Kindle Cloud Reader about a year ago and Kobo has a cloud-based service in beta.