The tenth book in the Thaumatology series, The Other Side of Hell, is now available on Smashwords. Use coupon code DL66G at the checkout for a discount valid until Boxing Day.
- Smashwords link: https://www.smashwords.com/books/view/267691
- Amazon US: https://www.amazon.com/dp/B00AS0NF54
- Amazon UK: https://www.amazon.co.uk/dp/B00AS0NF54
(Amazon now has it listed too.)