SyncFusion Succinctly Series of eBooks, located here , are by far the best source of free technical eBooks. They have over 150+ books written on popular software-related topics. Each book is around 100+ pages and covers the important aspects of a particular technology.
These ebooks are available for download the following formats
- PDF format for easy printing
- MOBI for easy reading in Mobile devices
- EPUB for easy reading in eBook readers
I used IceCream Ebook Reader for Windows found here.
SyncFusion also has Apps for Android, iOS and Windows Store. They allow offline viewing of these eBooks.
You can find the links to these apps below
- Android App in the Google Play Store is here
- iOS App in the Apple Store is here
- Windows Store App is here