If you are an author, one of the mixed joys and horrors of your life is the royalty statement. The joy part is that this could be a piece of paper telling you that you have earned some money. The horror is two-fold. Sometimes instead, the royalty statement tells you the reverse. Because books are sent out to stores sale or return, it is entirely possible in a six month accounting period to have negative sales when returns outweigh outgoings. This is highly dispiriting the first time it happens. But the other horrific aspect is that royalty statements often suffer from byzantine complexity. And this means it is very easy for the publisher to make mistakes. This is not malicious - it is just that as an author you are one of many and there is only a limited amount of effort they can put into getting it right. Because of this, I recommend that all authors check their royalty statements with a fine tooth comb. If you have an agent you may feel 'It's okay, I don't need to do th...