All joking aside, I’ve found the Hal Leonard series of books are excellent.
The Rock Guitar and Acoustic Guitar versions come with downloadable audio and use real tracks and riffs, so he’ll be playing his favourite songs soon enough.
While you can buy a songbook, it makes no sense as Songsterr has arrangements of pretty much everything and it’s free. (I pay £10 per month but that’s only so I can download and print them).
Finally, it’s probably worth getting a few lessons (or it could end up like this)