Top positive review
If you want to be the DM, you should probably own this book
January 29, 2018
Ahh, the DM Guide for 5th Edition. While you can run a game without ever looking at this book, it is chock full of useful information and tips that most people would find helpful. There is a free "Basic" version you can download from Wizards of the Coast; I honestly haven't read that, though I have printed it out.
This book has all the charts and tables you expect, and a bunch of information that isn't included in the Player's Handbook, including some interesting looking optional rules.
GIFT GIVERS: Perhaps you're looking for a gift for someone you know that plays D&D. If they haven't specifically asked for this, then it probably isn't a good gift. Not all players are going to be DMs, and if they're playing with the same group of friends there's a good chance the entire group could share the same book without too much trouble.