Summoning a written book item entity with pages tag doesn't work

using /execute in the /execute command not working

Skeletons stop running away from wolves when they go into water

Testfor command not working with data tag

Where are the coordinates?

/particle command not working with tilecrack_

setblock monster spawner delay, & MaxNearbyEntities tags not working

Fire charges & Ender pearls in creative

Zombies & Creepers not hitting me back in creative