Sons of Baal
It is hard for me to comprehend, but almost two years ago I wrote the opening story, Sons of Baal, in what became a hit series http://hereiamattheedge.blogspot.co.uk/2015/04/forgestriker-collection.html#.VfA_rigViko At the time I hadn't written any Sci-Fi, and I was wary of posting books on such an education based store as Barnes & Noble. My decision, to go ahead turned out to be a turning point in my writing journey.
Back then, I was lucky to sell more than a book a month on Amazon - nothing has changed in that retrospect - my reputation was for writing ghost stories.
In my mind the success of the second book in the series - Forgestriker - is connected to it being the title of the series. The book was written less than a month after SoB, and has not been my best seller only once in its 18 month time span - that was when it was deposed by SoB.
Return of the Lost
The third book in the series - Return of the Lost - is the last of the series to gain major sales. In comparison, the ratio of sales between the pairings of Forgestriker/SoB, and SoB/ RotLis constant at 2:1. Beyond these books, the other four books barely amassed sales equal to Forgestriker.