Where are books downloaded from Amazon Kindle stored? I download a book from Amazon Kindle, and would like to transfer it to my laptop. Where is it stored in my Android 4.4.2 phone (Kyocera Hydro Icon)?  

Is it possible to find it out using some download history of Android?

Is it possible to search the file (with guessed file name) in the file systems on my phone using some command or program?

Where is Amazon Kindle app stored? Can the book be stored in the same directory?
On my tablet (non-rooted) it exists at

storage\emulated\0\Android\data\com.amazon.kindle\files\

Mine has about 500 folders, which, I assume is one per book.
The names are some 10-character string of the form Bxxxxxxxxx, where x is alphanumeric. Inside each are a few files devoted to the book, probably the text in the file Bxxxxxxxxx_ebok.prc (it has the largest size), and a couple smaller files tracking reading progress, etc.

I have not been able to determine a translation between the coded folder and file names to the actual book, though I would, if I had tracked my download progress, have a rough idea based on calendar.