The Microsoft Technet site has made available a bunch of e-books in epub, mobi and pdf formats
At this moment there are 11 books available, here is the list
ASP.NET
Deploying an ASP.NET Web Application to a Hosting Provider using Visual Studio
Getting Started with ASP.NET 4.5 Web Forms (Beta)
Intro to ASP.NET MVC 4 with Visual Studio (Beta)
Office
Configure Kerberos Authentication for SharePoint 2010 Products
SQL Server
Master Data Services Capacity Guidelines
Microsoft SQL Server AlwaysOn Solutions Guide for High Availability and Disaster Recovery
Microsoft SQL Server Analysis Services Multidimensional Performance and Operations Guide
QuickStart: Learn DAX Basics in 30 Minutes
SQL Server 2012 Transact-SQL DML Reference
Windows Azure
Windows Azure Prescriptive Guidance
Windows Azure Service Bus Reference
Some of these books are pretty short, the shortest one is 6 pages, there are also longer books, the longest one is 422 pages. This a good deal, now you can load these books on your mobile device and even if you don’t have connectivity, you will be able to pick up some new things that you will learn from these books
You can check out all these books here: http://social.technet.microsoft.com/wiki/contents/articles/11608.e-book-gallery-for-microsoft-technologies.aspx

Denis has been working with SQL Server since version 6.5. Although he worked as an ASP/JSP/ColdFusion developer before the dot com bust, he has been working exclusively as a database developer/architect since 2002. In addition to English, Denis is also fluent in Croatian and Dutch, but he can curse in many other languages and dialects (just ask the SQL optimizer) He lives in Princeton, NJ with his wife and three kids.