From publisher blurb:
Bond a dragon, own the skies
The definitive guide to dragons in your 5e games, rules for dragon companions, dragon combat, and ancient draconic rune magic.
Meet Itza, a farseeing necromancer, wise in the ways of life and death, who knows the worth of sharing her observations with adventurers seeking the study of dragon power.
Discover the thrill of adventuring with a true dragon in your party. One that grows with your characters in size and power. Fight epic battles alongside your dragon and go head to head with a range of magnificent dragon antagonists and battle terrifying monsters. Explore new dragon-focused classes and subclasses and, when the battle is done, enjoy the spoils crafting mighty draconic items and casting spells to empower your whole party.
Introduces rules for dragonbonding and adventuring with one or more dragons in your party
Offers rules for fighting alongside dragons including aerial combat
Presents 6 new dragon broods and their associated stats
States new rules for fighting against dragons
Introduces 2 new magic systems
Adds new player character options, including 3 new races, dragon-themed subclasses for iconic races, and 3 new classes: Dragon Hunter, Dragon Herald, and Vaala Adept.
Offers everything a Game Master needs to craft draconic items and cast draconic spells
Presents a bestiary with 50+ new monsters