Only odds I have learned, are the main draw odds, like OES, or Flush draw. You can read the books and read and it can either improve your game or worsen it, poker is something you gotta learn over time on your own. You dont see pros playing by the books constantly, and if you watch tv, you catch em calling raised preflop on low suited connectors and if they hit the flop its beautiful, because things like that throw players off simply because they try to play the way you are, by the books.