Book for the latest version of CI?

[eluser]Unknown[/eluser]
Hi,

I noticed there are some books on-line that refer to version 1.7. I am just embarking on my CI journey and downloaded the latest version and tend to learn best personally by reading.

Can someone tell me if 1.7 is very different than the current version or if you know if there are any updated books? Will the 1.7 book edition send my down the wrong path?

Thanks,

Tom