Vapor

What's the state of you asking him? Cause like if you haven't just straight-up said 'Read this book' and shoved tWoK into his hands then that's where I'd start  

This is my entire life. I have always struggled to get people to read the stuff. 

But to answer your question, just tell him what it is. A glorious and near-perfect story with tear-jerking and inspirational characters, with an awesome and innovative magic system, that takes place on an wonderfully vast and exotic world, with the best world-building and plot money can buy. 

In other words, The best of epic fantasy. And arguably, the best of all fantasy.

(I fricken love this series with every fiber of my body. So it kills me when people dismiss it offhandedly (and sometimes flippantly) with out even considering it.)

So good luck! 

There funny. There serious. There happy. There sad. There fast. There slow. There fantastic. There real. There alliances. There betrayals.

There no longer a word.