Every once in a while I sit down with my budget and my schedules and try to figure out if there is anything else I can trim, or any more hours I can work. If there is, in fact, anything else I can do to squeeze more time and money out of my day.
Every time, the answer is the same. My best option is always: write more books.
Those first few hills and valleys between October 2012 and April 2013? At that point the only books I had out where "The Promise of Silk" and "In Varying States of Disgrace". "The Promise of Silk" had been out for a year, and "In Varying States of Disgrace" came out in October of 2013.
That first big jump is "One Night Contract". The second big peak is "January Thaw" (the dead cat bounce after it is "The Out of Towner"). In the time between those two books I released four other books "Summoning Sin", "The Promise of Steel", "The Promise of Lace" and "Sun Goes Down".
Constant release is the only thing keeping that rank, and those sales up, but notice that even though I've only put out one book since "The Out Of Towner", my rank hasn't nosedived back down to those late 2012 numbers.
Because I have a backlist. So now, when I do release a new book, I'm not climbing out of total obscurity every time. I have a little bit of a base to work with.
Constant out put is hard. I know, because I consistently fail to do it.
But it's the only way.