So I understand you correctly:
You want A) KUAL to launch "At boot", then B) to relaunch when you... The next part I am shaky on. Exit the book manager?
You mean like shutdown? or something?
Do you mean relaunch when you stop reading a book?
Sounds like A) is feasible. That would just be a little script.
I'm not sure on the details of B) so can't say for sure. but most things are possible.
As to that be the goal of the project, not really as we use the Amazon kindlet structure as a framework to run from.
However if you outline more clearly what B) might be I could have a peek at it for you.
Did you check out...
https://www.mobileread.com/forums/sho...1&postcount=15 perhaps just making it a "one button" firing process would meet your needs.