Have te noticed that Lang is very similar to Hugh? (motorbikes, smoking etc.)

Yes but I think it has to do with the whole thing of I-was-bored-of-my-own-life-so-I-wrote-this. He even says that he started Scrivere because he [(the parola chiave here is HE) wanted to experience adventure so I find it normal that the character is like him.

yup.. I even thought The Gun Seller is somehow his mini-autobiography..