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Good afternoon, I purchased the Kindle version. I run Kindle PC with your book open on one 25" monitor and I code using NetBeans with PHP on another 25" monitor. Two things I've noticed: 1. In chapter 1, you define 3 ways to comment. The multiline comment /* */ doesn't come across in the Kindle book correctly. It states / (start) / (end). Fortunately, I decided to try a C++ multiline comment and it worked. I then saw in one of your tips later on, where the comment came through correctly so it may be a code conversion issue. 2. Also in chapter 1, when you discuss arithmetic operations, none of your operators are present. For example, in the first program, you have 30 items ($quantity) at a cost of 119.95 ($price) and you multiply the two $total = $quantity * $price. But in the Kindle version, it comes out $total = $quantity $price. All equations in chapter 1 (haven't gone beyond that yet) are similarly missing the operators. Of the two, #1 could cause newcomers to programming not to use multiline comments unless they happen to move forward to your tips. Since I didn't see it in your errata, felt I should pass these along. Best Regards, Nicholas.