They are all good but I do recommend anything by (Maj) Les Hiddens (spelling) the "Bush tucker man" and the WA Police survial guide.
Brilliant series of books from les, including the history to see where others went wrong.
haven't seen the WA Police handbook for a while but found it after a brief search
HERE (PDF 1.27Mb)
Print it out on A5 paper and stuff it in your navbag, mine is in AIP Folder after a bit of strategic hole punching.
