I've read a lot of books in my day and
none of them will change your life like the Holy Bible. But brutha, next on the list is Boxster/Boxster S Manual. It's definately worth the investment (both timewise & financially).
From system checks to warning lights, tire pressure rates to bulb sizes -this book has it all! Detailed illustrations make this read a piece of cake! Oh, and there's one special twist at the end when the Boxster... well, I'm not gonna give it away, you'll just have to read the book.