Book
Adventuring Gear25 gp5 lb
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 (described later in this section).
Source: System Reference Document 5.1 · CC-BY-4.0 · 5th Edition 2014