Well after my last book, I’m now reading High Performance MySQL.
My new job now has me working in a much larger server farm and so now instead of handling 10,000 users I’m handling many more times that. This book will build on my background and make my queries work better in a distributed environment.

I hope you are reading the second edition. Your image is of the first edition. The second is much improved.
I am. Its a good read so far, like using Triggers for instance for speeding up queries.