A decent desk pen, desk organiser, or simple desk accessory is a secret Santa gift that works if he spends any time at a desk working or writing. This is not a novelty item shaped like something but a functional object that improves the experience of working at a desk, whether that is a pen that actually writes well or a small organiser that keeps things in order. The best desk gifts are made from materials that feel solid and look good enough that he will not hide them away, something that improves the aesthetics of his workspace rather than cluttering it. A gift like this under ten pounds shows you understand that people who work at desks notice the small things that make the experience better or worse.