Keep in mind this is a quickly thrown together tutorial and the photos are quick snaps, not the best quality. Also, I should have numbered my arrows more efficiently. But, I didn't, so here goes.....
I'm going to delete my own novel, Aurora Rescue, off my Kindle since I've read it and know how to find it again if I need to. I bring up the main menu and, using the down arrow, highlight the name of the book (Image 1, #1). I then click on the right arrow (Image 1, #2).
Other functions I use a lot are accessed by the little button to the right of the selection button (Image 4, #3) I press this when in the main book menu mode to get to "Settings" (Image 4, #4) where I like to keep the Kindle on Airplane Mode while I am not downloading books or checking the book description. Saves on the battery life.
Also, when I am in the book itself, I like to use that button (Image 5, #5) to, among other things, adjust the size of the font. And, if ever I am roaming around my Kindle and want to go back to previous pages or previous screens, I use the little "Back" button on the far left (Image 5, #6)
My Nook is the device I have that has everything in color and lets me access the internet, do emails and the like. It also has a method for either removing books from the front page or off the device completely It also has its own cloud so nothing I have purchased is completely lost.