cappadocius wrote:Java Man wrote:There is no rule saying you can use a spell you have not prepared crom your spell book. Your book is not a magic item that enables casting.
So, by reading it silently for an hour, I can cast a spell 18 hours later.
By reading that same book aloud, I can't cast the spell right now?
So by reading a cookbook, you should be able to eat your cake right now?
Actually that's exactly how it works.You read the cookbook in real-time, following directions as you go, and at the end of the casting/baking, you have a cake.
You don't read the cookbook in full, and then put it away, and then a couple hours later "remember" all the steps in baking the cake and do it then. That's just silly. ;)
To OP: You're wanting either 5th Edition or Homebrew. Personally, I'd say you can cast directly out of your spellbook, but the casting time takes 1 minute per spell level to cast. No one is gonna take 30 rounds to cast a fireball, and doing it that way makes utility spells available without eating up your precious slots, but doesn't totally trample the idea (and pricing) of Scrolls, which can be activated as fast as a memorized spell.