"Bayesian Core: A Practical Approach to Computational Bayesian Statistics" by Marin and Robert, Springer-Verlag (2007)

What is the best introductory Bayesian statistics textbook?
I am wondering how to conditionally load child themes? I have a site that is going to change with the seasons. The underlying architecture will remain the same, just different styles and a few minor changes. It seems that child themes is my best bet for this, vs using a bunch of conditional statements within my main theme and loading different stylesheets and what not.

What I am stuck on is how to properly load a specific child theme based on a date?
