I’ve just posted 15 copies of There’s a Bear on the Roof to the Amazon Vine programme. I think the idea is that they then forward them on to some top-reviews. The contact for this was made via the IPG (Independent Publishers Group). I had an email from Amazon with some PDF’s to print sticky labels over the bar-codes so the reviewers had a special Amazon Vine way of identifying the book. Fingers crossed it gets some good reviews!