From publisher blurb:
Joining the Giants is your way to finally take on the role of a giant in your next 5e adventure.
When you picture playing a giant you see yourself smashing through buildings and rampaging armies with creatures and things flying through the air from your mighty strength.
So you go to the sources, pick out all the options which have the flavour of a giant and even cause you to become larger for a limited time. Except that’s where it ends and it’s disappointing. A single d4 to represent your newfound power, it’s not even worth attempting to play one anymore.
So the dream ends and you move on.
Joining the Giants scraps the fear that being a giant is going to be game breaking and lets you have it all. You’ll feel like you’re towering above the trees, stomping through hordes of monsters and attempting to hide in the most unlikely places.
It’s one thing to say you’re going to be able to play a giant and another to actually feel it.
Joining the Giants has been designed so that giants don’t become the only choice. It’s been designed so that one or even the entire party can choose to play one.
In fact, sometimes it may not be advantageous to be one (although the thought of a giant trying to sneak around unaware will bring some great roleplaying situations to the table).