What page is the Rule on Bonus Action Spells?

What page is the Rule on Bonus Action Spells? I have been getting this WRONG!

Ok…so I am in page 202. “You cannot cast another spell during the same turn”….I think I am missing something…

Can you concentrate on a spell whose active effects are on an other plane of existence?

With Polearm master feat and cover…

How works Passive Perception for elf during Trance?

Is Commander’s Strike melee only?

What would you say the damage die for Nunchaku and Bo stick would be?

If I cast Gaseous Form on my familiar, can my familiar still deliver spells with a range of touch using its reaction?