As happened earlier in the year, here is another good sale (for those in the UK and Ireland) from HarperCollins - this does seem to cover all of the Print-on-Demand titles as well as deluxe and trade editions in print.

Sale runs until August 5th, 2022, with 40% off all titles (not just Tolkien). "Simply add code SUMMER40 at checkout, and we'll automatically update your cart with your savings."

The Official Tolkien Bookshop