If you’re able to buy/order Sorry Men from a local independent bookstore, that would probably be the coolest way to get hold of it.
Otherwise, you can get the paperback or eBook from all the usual places, some of which you can find below.
If you’re eager to avoid Jeff Bezos, give these a go:
If you’re in Hong Kong:
Signed copies of Sorry Men are available at Goodman Barbershop in Causeway Bay (4th Floor of 11 Lan Fong Road).
Sorry Men is available at Bookazine online and in their stores in Prince’s Building, IFC Mall, Lyndhurst Terrace, Festival Walk, and Tai Kwun.