We need more 5E supplements like this. Let's face it: D&D 5E is great, but it's a bit on the shallow side. It doesn't take long before all the classes become familiar, the backgrounds all look like old news, and you glaze over the list of feats looking for something original. Enter the Midgard Heroes Handbook. Wow, this is basically your Player's Handbook 2, with an insane selection of new races, subclasses, backgrounds, feats, new spellcasting rules and hundreds more spells & magic items.
The book of course shines if you play in Midgard, which is fast becoming my favorite fantasy campaign setting. This book is also one of the main reasons why I love Midgard. The Midgard Worldbook does a great job of describing an amazingly unique world based on the greatest pantheon ever (Norse mythology), but it's the Midgard Heroes Handbook that turns this unique feeling into unique gameplay. As a player, you'll find here cool options you can use in other campaign worlds, like a Circle of Stones druid, or the Seer background, and countless more. The new races and many backgrounds are of course tied to Midgard, so it would be DM's option to allow them in your other games. As a big druid fan I was hoping for more druid circles than just the one here, especially when there's 2 new sorcerous bloodlines, 3 new warlock pacts, 11 new wizard traditions and 17 new cleric domains! The martial and rogue characters get new subclasses too.
If you're not familiar with Kobold Press, you can basically expect quality content, writing and layout that rivals (and sometimes surpasses) material from Wizards of the Coast. As a DM, all Kobold Press content is automatically considered official, no question.
All in all, you can't go wrong with this book. I'm a HUGE Kobold Press fan, and this book will turn you into one too.