I've recently got into forensics and it's pretty intersesting. If you've ever wanted to go "under the hood" of comoputers then you should try it out.
Im currently reading this book: The basics of digital forensics by John Sammons.
Torrent: torcache.net/torrent/1183ABCBDE21DD46E4AF0A164B69B34F6E91B505/%5Bkat.cr%5Dthe.basics.of.digital.forensics.torrent
This website also gives some tutorials on common aquisition methods ,among other security topics: http://resources.infosecinstitute.com