Can anyone in algorithmic trading/investment software suggest a good place to start reading and learning about the subject? In particular, I'd like to learn ab

Can anyone in algorithmic trading/investment software suggest a good place to start reading and learning about the subject? In particular, I'd like to learn about investment strategies and algorithmic trading. It seems like many of you work in the field and know quite a bit about the subject, whereas some of us are on the outside trying to look in.