With this primer, you immediatly get a taste for what the Cities of Myth line is going to be like - and immediatly it is different than almost anything out in the market for 5e. Right from the get-go, you see that what the Realmwarp team and contributing creators are going is aiming to give you an experience like no other: players become explorers, the DM becomes a World Runner, the different settings are connected by ley lines that crisscross the world, and the differentiation of denizens from travellers and explorers. What I love most about this book is that it is based almost entirely on a sandbox model - you are explorers discovering the lost cities of ancient tales (which they have got a metric brick-ton of other books coming along), and this primer gives you all you need to wet your whistle before wanting more. I highly recommend snagging this primer and subscribing to the newsletter to keep in the loop for more info on Cities of Myth. Without a doubt I can already give this a Comics, Clerics, & Controllers Golden d20 Badge.