Have just been to Oerlikon shopping and have disscovered a new book shop beside the Migros do it yourself.
It has quite a good selection of English books(its only been open a month) and you pay 1rp. for every book side.
You can also take books back (but only in good condition) if you take 2 books you can choose 2 new ones and only pay for 1.

this is going to be very dangerous for me...

But good if you like reading as much as I do.
I forgot to say its open Wed 09.00 til 15.00
Thur. + Fri. 10.00 til 16.00 and the 1st Sat in the month 03.00 till 12 Happy reading

Is it still only open within such restricted time periods...??

Shes only been open about a month and I think shes waiting to see how it goes