Bestsellerdom and the power of mailing lists

A couple of my books – Please Release Me and Girl Having A Ball were reduced to 99p over Easter on the UK Kobo site. Amazon was (still is) price matching. And then, earlier this evening, this happened:

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Which means I’m a bona fide bestseller (in fantasy, if not romance). The book has a ghost as a main character – hence the fantasy listing.

Girl Having A Ball, on the other hand, is languishing much further down the charts.

What made the difference? Kobo included the cover of Please Release Me...