A book might contain poetry, historical accounts, information pertaining to a particular field of lore, diagrams and notes on gnomish contraptions, or just about anything else that can be represented using text or pictures. A book of spells is a spellbook.
Crisp pages whispering untold stories, binding sturdy yet yielding under gentle touch. Inked letters dance across parchment, secrets waiting to unfurl. Each chapter a doorway to adventure, the weight of knowledge palpable in your hands.