Hayley Cox, Senior Publishing Coordinator at Candy Jar Books, said:
Lethbridge-Stewart has had a great 2015. We were pleasantly surprised by all the positive feedback we received, and felt that we should give something back to the fans for the holidays. This story is just for them.
Various bundles are available for the book series, both for the four published this year and those due to be published in 2016 (kicking off with Moon Blink by Sadie Miller): see the Candy Jar website for full details.