The Monster Manual Expanded II does exactly as promised: this tome delivers dozens more variants based on the eye-opening reference bestiary, Volo's Guide to Monsters, and the darker and more powerful creatures of Mordenkainen's Tome Of Foes. Like its predecessor, MME I, this sequel enhances the lore of well-known monsters and provides a font of inspiration for Dungeon Masters who want to incorporate any of these creatures into their party's adventures or their own homebrew campaign setting. Furthermore, the wealth of demon and devil variants make this book a great resource if you plan to run Descent Into Avernus, Out Of The Abyss, or any underworld-themed campaign, and the NPC stat blocks are good for populating any setting with powerful allies and enemies.
To reference my critiques of MME I, this book appears to have a higher proportion of low CR creature variants (check!) and a tighter, more professional layout (check!). Plus, the creatures by CR appendix makes it easy to scan for appropriately-challenging monsters! The Monster Manual Expanded II is best-suited for DMs whose players are deeply knowledgeable of D&D creature lore, and those who want to enrich their games with a diversity of monsters.
[5 of 5 Stars!]