Few days ago the second edition of Troubleshooting Oracle Performance was finally published. Today, I updated the pages on this site that provide information about the book. It goes without saying that the new pages cover the second edition. Hence, from here you can access the description, the table of contents, the forewords written by Jonathan Lewis and Cary Millsap, as well as a page with some errata. Yes, as for the first edition, I found some small errors before receiving the first printed copy of the book. I will publish the page from where you can download the scripts referenced in the book in few days.
Note that some of the information provided by online book stores (e.g. Amazon), still have to be updated. For example, they show a wrong cover and provide a completely wrong number of pages.