Another fantastic supplement for those running Tomb of Annihilation, Mines of Chult provides nine pre-designed minor dungeons (all themed around mines) that you can seamlessly insert into your ongoing Tomb of Annihilation game.
The majority of these dungeons are for Tier 1 and Tier 2 adventurers, with one designed for adventurers who have already conquered the Tomb of the Nine Gods and are looking for an additional challenge.
Each of these mini-adventures comes with options for scaling them up (or down), so you've got a lot of flexibility as to which ones you would like to run. While some definitely fit into the setting more effortlessly than others, all should be fun side-quests to keep your party from getting burned out on the hex crawl.
[5 of 5 Stars!]