When comparing Waterstone's vs Harlequin, the Slant community recommends Harlequin for most people. In the question“What is the best eBook store?” Harlequin is ranked 5th while Waterstone's is ranked 8th. The most important reason people chose Harlequin is:
Harlequin use to offer self publishing under the name Harlequin Horizons but under criticism was spun off and renamed [DellArte Press](http://www.dellartepress.com/). So users can self publish with DellArte Press but it will not be under the moniker of Harlequin. Harlequin does still offer a way for anyone to [submit their book](http://www.harlequin.com/articlepage.html?articleId=538&chapter=0) to them but it is no guarantee it will be published.
Ranked in these QuestionsQuestion Ranking
Pro eBooks offered are Adobe Digital Editions compliant
Waterstone's eBook store sells .epubs that are encoded with Adobe Difgital Editions DRM. This allows the .epubs purchased to be used with the Adobe Digital Editions application that can then transfer purchased .epubs to ADE compliant eReaders.
Pro Generally cheaper than WHSmith
For those that are stuck using UK eBook stores it woul appear as though Waterstone's has better prices than WHSmith.
Pro A self publishing of sorts
Harlequin use to offer self publishing under the name Harlequin Horizons but under criticism was spun off and renamed DellArte Press. So users can self publish with DellArte Press but it will not be under the moniker of Harlequin.
Harlequin does still offer a way for anyone to submit their book to them but it is no guarantee it will be published.
Pro Books other than romance novels
Harlequin does offer eBooks that are not of the romance variety with a worldwide selection of action, suspense and adventure.
Con UK only store
Waterstone's is a UK only store, so those outside the region are out of luck purchasing from them.
Con Some eBooks more expensive than paper books
Sadly Waterstone's does not have as much pull with publishers as Amazon so there are more high priced eBooks on their store.
Con Sells Kindle devices but its eBook store is .epub only (which are incompatible)
Something of an odd predicament in that Waterstone's has a contract with Amazon to sell Kindle devices even though they only sell .epub eBooks on their Waterstone's branded eBook store.
Con High Prices
Averaging to about 85% of a hardcover price the eBooks on the Harlequin store a pretty pricey.
Con Limited to only Harlequin eBooks
The selection of eBooks on the Harlequin eBook store is limited to only Harlequin eBooks, which are mainly romance novels.