Complex sentence: For wizards, these spells are generally committed to memory after a session of meditation upon a spellbook containing the details of the incantation; sorcerers and bards know their spells innately and do not need to prepare them at all, nor do they require a spellbook.
Split into simpler sentences: For wizards, these spells are generally committed to memory after a session of meditation upon a spellbook containing the details of the incantation. Sorcerers and bards know their spells innately and do not need to prepare them at all, nor do they require a spellbook.