Gathering items and information of magical power are the cornerstone of playing a Wizard in 5e, and new spellbooks in Tasha's offer both at once.

The wizard class in 5e is traditionally structured around the eight schools of magic in Dungeons and Dragons: Abjuration, Conjuration, Divination, Enchantment, Evocation, Illusion, Necromancy, and ...

The war magic wizard is a kind of middle-ground between Evokers and Abjurers. You're highly effective in battle, but you shouldn't throw yourself into the thick of combat without a very good plan.