A very short post to let you know that Duncan and I are doing a holiday promotion for our vSAN 6.7U1 Deep Dive book. We will start the promotion for the e-book on December 24th, when we will lower the price of the e-book to just US $0.99 (Amazon.com) and UK £0.99 (Amazon.co.uk). The price will then gradually rise back to the original price over the following 10 days. Unfortunately, Amazon does not allow publishers to create promotions on every site, so this promotion will only be available on Amazon.com and Amazon.co.uk. For the paper copy of the book, we…