Some good deals in their deals across crime, fiction, lifestyle and sci-fi books:
https://www.bookdepository.com/deals-store
On top of this you can 5% of the purchase price back in cash back on to your AIB / Bank of Ireland account if you:
1) activate the offer at https://boi.visaoffers.eu/ or https://aib.visaoffers.eu/
2) use your bank card when purchasing at bookdepository.com