From the shameless plug department
I was commissioned by AMD and Sun to write a short ebook called HPC For Dummies. While I could have written a much longer book, I think it delivers on the essentials. The book is available for free after registration. You do need AdobeÂ® Digital Editions for Windows or Mac to view it (sigh, most HPC people, like me, use Linux). Update: Now it is available as PDF. Yea! Register to get it.
If there is interest in a longer book, either an extended HPC for Dummies or the completion of another book I started called The Art of Linux HPC Clusters, please take the front page poll to the right. The survey is important because part of getting a publisher interested in a book is convincing them someone will buy it! So if you want more/better/updated HPC Cluster Books, please help me out. By the way, all our past polls are located here.