I used it for a while, ended up switching to Haskell, which had a lot of similar benefits despite being so different. If you're going to use it, I highly recom

I used it for a while, ended up switching to Haskell, which had a lot of similar benefits despite being so different. If you're going to use it, I highly recommend the D Programming Language (book). It's extremely well written, and remains once of my favourite technical books.