The only way a book can kill you is if it falls on your head (for a heavy book), or is poisoned, or something like that.
Their poisonous
Yes
No.
you kill them with a steak knife
It is against the law to kill anyone, REGARDLESS of the circumstances.
If by shooting someone you mean that you actually KILL them . . . (in the US) a total of 39 jurisdictions in all . . . 37 states plus 2 federal entities still enforce a death penalty.
No.
Yes.
Some fungi have a high risk of death if consumed.
It would be possible to kill someone through headbutting or stomping you to death. Neither is very likely.
Most likely no. It may damage their sense of smell for a while, but not actually kill someone. <><><> Exception- in a fully enclosed space, such as a tank, anything that displaces the normal air, such as methane or carbon dioxide, CAN cause death. There simply is not enough oxygen to breath.
You can't REALLY kill someone with a Death Note. It's just an Anime, which means that it doesn't really happen. In the Anime if you want to kill someone you need to write down their first and last name and think of the person's face in order to kill them.