[MartinC]

There are a number of Hilliers on Amazon, including a Michael Hillier and a Michael R Hillier, both writing fiction*. You might start by going to Amazon's Author Central, creating a profile for yourself and linking your books to it, to give the thing a bit more focus (doesn't cost anything). I believe you still have to do this for each of the Amazon stores (.com .co.uk and .de) separately.

I don't know which are yours, but they could all do with product descriptions that sell the books a little - not simple synopses.

If "The Eighth Child" is yours, the product data looks a bit odd: The title is given as TheEighth Child throughout (no space between the first two words) and the Product Description has no capital letters at all. Doesn't inspire confidence.

*Mike Hillier also brings up a result - I think all three are you.