When comparing Kobo Books vs Waterstone's, the Slant community recommends Kobo Books for most people. In the question“What are the best eBook stores?” Kobo Books is ranked 2nd while Waterstone's is ranked 10th. The most important reason people chose Kobo Books is:
The Kobo eBook store offers a separate file download (most of the time) from within a users browser. this file is called and .ascm file and is what is used to add an .epub to the [Adobe Digital Edition software](https://www.adobe.com/solutions/ebook/digital-editions/download.html).
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Pros
Pro Offers separate Adobe Digital Editions downloads
The Kobo eBook store offers a separate file download (most of the time) from within a users browser. this file is called and .ascm file and is what is used to add an .epub to the Adobe Digital Edition software.
Pro Send eBooks as gift
Kobo Books eBook store allows users to send eBooks as gifts to their friends and loved ones.
Pro Self publish
Kobo offers a way for users to self publish their own eBooks with a service called Writing Life.
Pro Many coupons
Kobo often offers a lot of coupons for their eBook store. Some being as high as 80% off coupons. Though most only work on non agency eBooks, so not that great if the user only reads the newest of releases.
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.
Cons
Con Not all eBooks sold on the site are Adobe Digital Editions compatible (.epub)
For some reason not all the eBooks available on the Kobo eBook site are downloadable as .ascm files. Most likely Kobo leaves this up to the publisher, as Houghton Mifflin Harcourt does not have a single book on the Kobo store that offers a separate .ascm download. What most users are unaware of is that the Kobo store is not primarily an .epub bookstore. Kobo uses a proprietary format called .kepub that only works on their own Kobo branded devices. Many of the books they sell do offer a separate .ascm file download, but not all. What exacerbates this issue is that there is currently no way for a user to know if an .ascm will be offered until after purchase.
Con Kobo randomly changes prices
Depending on whether a user is logged in, different prices will be shown on non agency eBooks. Non agency eBooks allow for Kobo to set the price of the title instead of the publisher and sadly it does appear as though Kobo has taken advantage of this to entice new users into thinking their books are priced lower than they actually are.
Con Desktop app doesn't function
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.