Bacon Bits
Hero
Yeah, and you had to roll the d% chance to learn a spell from a book or scroll based on your Int. If you failed, you had to gain a level to try again.Pretty much how 1e worked
I remember some DMs having the magic-user roll the d% for each spell on the list when they gained a level. That way you had a list of spells possible in the book, a list of spells that your character could learn, and then the list of spells that you actually had in your spellbook.
It sounds like a waste of time, but the DM did it just so they knew what spells would be immediately useful and those that the character had to wait for.