Dude, I love hackers like you. Not many people could have tweaked so much in such a short time. Good work.
I'm glad you liked reading one book. You must remember that the main purpose of the Kindle, from the beginning, was to be a book reader.
There are so many thousands of wonderful books available, many that are free, that you really ought to consider shunning the comics for a while and start reading books. Who knows, you may get hooked like the rest of us. There is no other addiction that is so good for you.
I do hope you will try as many books as possible before your 30 days runs out, and then maybe consider keeping the Kindle. Some of the free classics are wonderful, even if some in HS you were forced to read, did not convince you, try some others.
And Amazon's great deal of getting samples lets you try each book available to see the first few chapters. Then if it does not hit the spot, just delete it.
Something to think about.