I’m hard to reach.
Given my demanding roles as a scientist and teacher, I try to dedicate as much remaining time as possible to learning and writing. Maintaining active correspondence is incredibly rewarding but also extremely time-consuming. After much introspection, I have chosen to be hard to contact so I can focus more time on my work.
Email is great for staying on top of things. My job is to get to the bottom of things.
With that said, I love hearing about interesting books, articles, etc. related to the topics I cover. If you wish to share anything along these lines, please write to email@example.com. (But please know that I will usually not be able to respond.)