https://link.springer.com/shop/palgrave/hardcover-sale/en-eu/

70% off select hardcovers coupon code: PALHC
Valid until December 31st, 2022

An example Tolkien title that falls into the "select hardcovers" category covered by this offer:

Tolkien, Race, and Racism in Middle-earth by Robert Stuart (2022)
https://link.springer.com/book/10.1007/978-3-030-97475-6