Fantastic Voyage is a good book
•Benes knows something that will even out their military the same with all the other militaries.
•Benes got into a wreck on his way to headquarters from a suicide driver.
•The only way to heal Benes without doing more damage is to miniaturize a submarine and go into his body.
•A crew goes into the body in the miniaturized submarine injected into the body from a needle.
•The mission works and they get the information they need.