I have spent the four months or so writing a review of the upcoming OS X 10.8 Mountain Lion Client and Server Review. The review encompasses a massive amount of information surrounding OS X 10.8 Mountain Lion. This includes new features, such as Notification Center, GateKeeper, Voice Dictation, and Game Center as well as refined features like iCloud and Mail.app.
Also included in this review is a section for developers that covers topics like ARC, Single Sign-on, and Developer ID. The other big section is for the Server application. The Server section includes, DNS, File sharing, Wiki, Profile Manager, and many other sections.
The Review is expected to be available in the iBooks Store on July 25th, 2012. You can pre-order it now for $2.99 (Or equivalent in your iBooks Store).
You can also purchase the Kindle version at Amazon. Once the Barnes and Noble version is available, I will update this post to give you the link to that version.
Here is the list of Countries that the iBooks version is available in: (You will need an iPad with iBooks2 in order to be able to view the review)