I know it's still early but I've managed to buy loads of things already for my 2 daughters. And absolutely nothing for my son.
He's quite techie/geeky and has no interest in clothes, smellies (he has loads of unopened aftershave) and he can't really eat chocolate or sweets due to having braces and ibs. He's 15.
So far the only thing I can think of is apple buds. He wants cash for his main present to put towards a new Ipad but I wanted to buy him a few surprises.
The only books he's enjoyed have been:
Hunger games
Diary of a wimpy kid
Ripley believe it or not
And years ago he liked a series of ghost stories by Chris Mold
He likes gaming, rock music (eg foo fighters) drama, big bang theory, game of thrones...