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If you: - learn WordPress stuff - have performance problems on your WP page/blog - don't know if you have performance problems on your WP page/blog - and value your time more than $8 per hour this book is a must-have for you. The included links alone will easily save you an hour of web browsing. The book is a masterpiece. The details are just mind blowing. Yet, if you have no idea what this technical stuff is all about you can find a few easy tips to improve your blog performance within minutes. I've just installed anti-spam plugin recommended by Pablo. Now I can hang on Facebook for a few more minutes instead of deleting spam comments ;) One easy tip and I've got more in return than a price of the book. Seriously, if those two words - blog & performance - have ever crossed your mind together, buy this book!