I wrote an eBook called Customer Service: From Weak to WOW!. You've probably downloaded it already (it is free).
Tim Miles wrote one too. His eBook - Shareworthy Customer Service - is definitely shareworthy. I have read through it twice and I'm working on a third time. I am going to use it in my next staff training (and a few more trainings after that).
Yeah, it is that good.
Go check it out.
PS Tim and I think a lot alike. If you have to choose between spending money on advertising or on raising the bar of your customer service, raise the bar every single time. If you have enough money to do both, do the customer service first.