Instructions:Mymemory.com are offering 50% off all photobooks as a mothers day promotion. Just create your photobook and use the code MUMSDAY at the checkout.
I know "Free" photobooks can be had, but this offer is good if you want to create a larger photo book, as the free ones can end up expensive if you start adding pages etc.
I used Mymemory.com when they had a previous promotion, I was very impressed with the quality. I also had reason to contact their customer services, who were brilliant and very efficient.
Unfortunately no end date mentioned in the email.