From publisher blurb:
Just as half-elves are the result of the union between elf and human, aasimar are the result between a union between human and celestial. Generally kind and working toward weal rather than woe, these typically good aligned beings seek to help those in need and right wrongs. This product allows you to build Aasimar player characters for your 5th Edition Dungeons & Dragons game, bringing holy might and radiant light to bear against your enemies!
What does this book have to offer?
Learn more about your Aasimar heritage!
Wield the awesome might of your Radiant Flux racial trait!
Choose to be a Child of the Deva, Planetar or Solar as a subrace!
Explore racial lineages and gain powers over light, flying and liars!
Review and understand new rules about Partial Resistance!
Find out about new equipment, spells and magical items unique to the celestial children!
and much more!