I am a big fan of CS Lewis. I believe he is one of the best Christian authors in the English language to ever live. Some of my favorite books were written by him, including Mere Christianity, The Screwtape Letters, and The Great Divorce. In addition the Chronicles of Narnia are some of the best children's literature I have read. The Narnia books alone have sold over 100 million copies!
Here are a few quotes to whet your appetite, if you haven't read much from him:
On learning:Then there is the masterful image of the "red lizard of lust", which I believe can be life transforming for someone suffering from the vice of lust.
"God is no fonder of intellectual slackers than any other slackers."
"To love at all is to be vulnerable. Love anything, and your heart will certainly be wrung and possibly be broken. If you want to make sure of keeping it intact, you must give your heart to no one, not even to an animal. Wrap it carefully round with hobbies and little luxuries; avoid all entanglements; lock it up safe in the casket or coffin of your selfishness. But in that casket -- safe, dark, motionless, airless -- it will change. It will not be broken; it will become unbreakable, impenetrable, irredeemable. "
"We can rest contentedly in our sins and in our stupidities, and anyone who has watched gluttons shoveling down the most exquisite foods as if they did not know what they were eating will admit that we can ignore even pleasure. But pain insists upon being attended to. God whispers to us in our pleasures, speaks in our consciences, but shouts in our pains. It is his megaphone to rouse a deaf world."
If after reading these short snips from Lewis you aren't motivated to read more, then listen to what Fr. Barron says about him: