When I wrote the Eden Paradox series - 4 books published between 2011 and 2014 - particularly the first two, but also the entire series, sold well into 4 figures (i.e. in the 1000-6000 range, mainly eBooks). But after 2015 sales waned. By 2018 sales hadn't exactly flatlined, but it was a slow, coma-like pulse of a few books a month.

At the end of 2018, after discussions with the publishers, I re-acquired the books. I then produced new covers for the first two, using better artwork more consistent with the style of the last two books, and re-published them myself on amazon kdp. The re-pubishing part was free though laborious, but by Jan 25 I was ready to re-launch the entire series. I didn't do much personally in the way of marketing as a few 'life events' were getting in the way, but the results - whilst not spectacular in terms of best-seller sales - were heartening, as you can see from the graph (250 sales over 6 weeks) taken direct from KDP's site yesterday.

In particular book 1 has done well, but a healthy number of readers are going on to read the entire series (it's early days so I hope the sales of books 2-4 will strengthen). Most sales are in the US, with UK close behind, with some in France, Canada, and one Aussie.

I'll be launching a new book (the first in a new series) by the summer, so hopefully if that one does well it will keep an interest in this series, too, and vice versa.

So, is it worth all the effort to re-brand and re-launch an old series? Well, as with most authors, it's not about the money, it's about being read, and for me this has been a definite 'win', having gained a new batch of readers for a series I poured heart and soul into five years ago. I'll review sales figures at the end of the year, to see if they were sustainable.

In the meantime, for other authors who may be pondering this same question, the answer is simple - re-branding and re-launching can breathe new sales life into a series.