Best knife training manual is a book on sprinting.
You are correct sir. Knife training manual or material? Come on, be sensible, practical. I have never known people fight with
knives. I have known people be stabbed to death with them, but not fight, if you are talking self defence. Apart from Seagal and Tommy Lee
Jones in Under Siege of course ;-)
If someone comes at you with a knife run like f***. End of story. Do not try and fight them.
If you _have_ to defend yourself improvise a ranged weapon - a stone, brick, maybe even a shoe, or a handful of loose coins at
close quarters to the face / eyes that you keep in your pocket for this very scenario. Then run. If you
have friends, loved ones etc. with you, get them to run too.
Of course if you are interested just in terms of training for the fun of it, as an interest etc., then crack on.
Hope that helps.