I have considered trying Kindle Unlimited in the past but finally bit when I saw this promotion. $2 per month for three months is a deal I could not pass up.
Amazon claims that they have more than a million((Use Dr. Evil voice here for effect)) books available so I doubt I will get through them all during the three-month special offer but it is worth a try.
If you do not know where to start, might I suggest Zen and the Art of Christmas Letters?
Note: this deal expires at midnight (PST) on May 6 so you have limited time to take advantage of it.