He is currently reading the 'Would I Lie To You?' TV programme tie in book, which is clearly not aimed at children! He loves humour, I think David Mitchell and Lee Mack are his heroes. Oh and Greg Davies because Taskmaster is his favourite TV programme (he'll even leave his PlayStation if that one comes on).
I'm struggling to find him things to read. He starts loads but he finds them boring and usually gives up. He likes Wimpy Kid and Tom Gates books but he reads them in about 2 hours and acknowledges they're too easy for him. I want to try and find him some teen/adult humour books that are appropriate, which is a struggle. He would love the new Robert Webb book, and I would love him to read it for all the positive messages it sends, but it's not really appropriate with all its talk of sex and wanking 
I've tried him on David Walliams and David Baddiel kids books but they don't engage him.
Anyone comes across and funny but not inappropriate books he might like? I'm not concerned about bad language.