Locking of Series in Comic Zeal and Pages and Notebooks in ThinkBook has been a very requested feature. As a developer my instinct has been to create as tight and secure a locking mechanism as possible and because it is so much work it just hasn't happened.
Lately I've been thinking more and more about how many weaknesses any system would have, no mater how secure I tried to make it.
It won’t be the default theme or the only dark theme. May not even be included in the final selection at all.
I figure if I post enough screenshots with the blue theme you will all love it when you actually get to use it.