This week's book giveaway is in the Cloud/Virtualization forum. We're giving away four copies of Mastering Corda: Blockchain for Java Developers and have Jamiel Sheikh on-line! See this thread for details.
1. The one written by Kathy Sierra and Bert Bates. 2. By Khalid Mughal.
But I prefer the first one. Because the way the book is written is good. Its like the author is talking with you. And one more reason is that Khalid Mughal book has got stuff more than what is needed (I read a couple of chapters in that).