HANA Book – Top Quality Published by IBM Free for SAP SDN Members. Please click in the e-link
I contribute with three colleagues of IBM, and we published an IBM Red Book on SAP HANA In-Memory Technology. My name is mentioned in page Xi. It is an excellent read to understand the new technology trend, and it is free !
Published by IBM, Top Class and the best part of it is totally free for you !
Please download it from : http://www.redbooks.ibm.com/redbooks/pdfs/sg248086.pdf