eBook.com has been around for many years and is considered one of the most popular digital book stores, with a huge range of eBooks available. They offer titles in many different eBooks formats including tens of thousands as EPUB.

Kobobooks.com provides an eReading service for smartphones, desktops, eReaders and many other reading devices to users from all over the world. They have over 2 million eBooks on their site, which includes both the classics and bestsellers in the EPUB format.

eHarlequin.com is a premiere web destination for women who love to read. Offering contemporary romance, thrillers, inspirational romance, African-American fiction, chick lit, suspense, Spanish, paranormal, sensual romance and more!

Diesel Ebooks is an eBook download heaven... One of the largest independent eBook stores with over 2.2 million eBooks. Only Diesel eBook store has custom bundles. 

If you're looking for romance eBooks then you're sure to find something to please at Australia's own Mills & Boon! From pure romance to hot and sexy, medical drama to regency romps, relationships to thrillers, there's something to suit all tastes.

 ebookShoppe.com is the UK's first and largest independent eBook retailer with over 50k titles in ePub, PDF, and several other book formats - latest releases of fiction, academic and the classic.

Barnes & Noble is one of the internet's largest book stores and now they have many eBook titles in the EPUB format. Some of these titles are only available for US only!