The Belgian (external) payroll office “Acerta” wrote a book about employment regulation in Belgium.
The book itself is in English… but the information about the book is only in Dutch (weird). Anyway, a very helpful book for all foreign businesses who want to hire employees in Belgium.
And since we’re talking about employing people in Belgium, we might as well include a link to Pro-Pay, an external payroll office that specialises in international employment.