You just randomly thought of stuff...
things should have cohesion.
things should make sense.
we can't for example, have a book series with four books about how using magic to affect others actions, without their approval is bad, and then on the fifth book have the main character use magic to affect the bad guy's actions to take them out.
wait bad example that applies to a book series i like
umm
where am i going with this
do things that make sense please
put thought into your ideas
wait that doesn't make sense either did i just say "put thought into your ideas"
umm