Selling some books - how to account ?

[Platypus]

Well it has crossed my mind not to bother. But presumeably Hector might check if he ever came knocking.

I would think even Hector has better things to do than check that all the purchases you ever made are still in your possession or have been properly invoiced out. What about all those stamps? Computer repairs... maybe he'll check inside your PC and look for that memory upgrade?

OK, seriously, just sell them on eBay and forget it.