How do you add a spell to a spellbook when a hero levels?

How do you add a spell to a spellbook when a hero levels?

Lets say you when a hero gets to level 5 you want to add an ability to their spellbook ability. How do you do this? I only know how to simply add an ability to a hero, but not to a spellbook. Can anyone help?

Thank you

give the spellbook multiple levels, and place it uner another level, then increase its level by 1 via trigger at level 5.

Damn was hopin there was a way to bypass doing that o well

Vex found a way to add spells to spellbooks some years ago, make a search

Triggers really aren't that bad man. Yeah it takes a little time to learn some of the basics, but I never really learned per se, just learn as i go. Each spell I do I learn more. If you need to, I'll start you on the right direction.