I began my first book titled "Project Exodus" in the fall of 1992 when I started college. This was before the days of Print On Demand publishing (POD) and the book ended up being shelved when my engineering coursework became more difficult.
Fast-forward to 2005, when I had taken an interest in studying the Antediluvian Age and the Ice Age that followed. I looked around for a book that accurately portayed it, and since the few I found (at the time) weren't what I was looking for, I decided to go off and write my own book. A few outlines later, I found that I had come up a framework from which many books could be written.
Meanwhile, the situation in the Middle East began to heat up with the Iraq War, and the subsequent nuclear race of Iran. I felt led to write another book detailing the roles of these nations (among others) according to my views and interpretations of the Bible. And thus "The Time of Jacob's Trouble" was born.
While that book was going through the publishing process, I went back and re-visited "Project Exodus" and ended up re-writing most of it, and ended up keeping only the rough plot and a handful of scenes. This was later renamed "Endeavor in Time" and happened to be published a week or so before the first book was released.