Any bookshops open in Brussels?

The write-up of the prime minister's announcement differs a bit in French and Dutch:
- in French "libraires" (bookshops) -- https://www.premier.be/fr/Coronavirus-Mesures-renforcees
- in Dutch "krantenwinkels" (newsagents) -- https://www.premier.be/nl/coronavirus-versterkte-maatregelen

So if you can find a newsagent that sells books, or a hypermarket for that matter, you'll be fine...

Waterstones Brussels closed until at least 5 April.

Check the newsagent in Stockel which has a collection of French and English books.

What Sophie Wilmès said was "librairies", or "boekhandels" in dutch, and they are indeed bookshops, albeit that traditional Belgian ones sell magazines, art products and stationery items as well. The one in our nearest town is still open so clearly what she said didn't get lost in translation.
Doubtless Waterstones has made its own commercial decision to close, just as a number of chain stores (eg JBC) that were then allowed to open had chosen to close by Tuesday.

Try Filigranes on Avenue des Arts - Metro ARS/LOI

http://www.filigranes.be/fr/
Can order online a have delivery, or visit Filigranes on avenue Louis Lepoutre!

http://www.filigranes.be/fr/
Can order online a have delivery, or visit Filigranes on avenue Louis Lepoutre!