From the back of the book:
From the horrible wrack dragon to the hideous skullworm, creatures frightening and wondrous are found throughout the Scarred Lands. Discover your favorites anew in this hand-picked selection of adversaries from the storied history of the Creature Collection and the Scarred Lands.
The Creature Collection 5e presents more than 175 creatures form the Scarred Lands setting, each painstakingly updated to work perfectly with the 5th Edition rules, each illustrated in full color.
The Creature Collection 5e features a host of tools to help you find the perfect monster for the encounter you're building. Also included are an appendices [sic] of battle maps, encounter seeds and a Challenge Rating index.
While the monsters herein are taken from the various Scarred Lands supplements released down the years, they can easily enhance any setting or campaign.