Amazon sent me some recommendations and they are good. 7 out of 9 look like something I want to read. Kind of for my own future reference here are the books they recommended:

* Even Faster Web Sites: Performance Best Practices for Web Developers by Steve Souders
* Complete Web Monitoring: Watching your visitors, performance, communities, and competitors by Alistair Croll, Sean Power
* High Performance Web Sites: Essential Knowledge for Front-End Engineers by Steve Souders
* Web 2.0 Architectures: What entrepreneurs and information architects need to know by James Governor, Dion Hinchcliffe, Duane Nickull
* Using Google App Engine by Charles Severance
* Erlang Programming by Francesco Cesarini, Simon Thompson
* Website Optimization: Speed, Search Engine & Conversion Rate Secrets by Andrew King

To be fair, I could probably learn everything I want to know about Erlang form the wikipedia page or the language’s website, but I’m still impressed with Amazon’s ability to pick up subjects I’m interested in, presumably based on aggregate data from many other web devs out there. It gives me a warm, fuzzy feeling to know I’m not so esoteric after all.