I was lucky enough to get an eARC and audiobook to read in tandem, via NetGalley.
This was such a fun fairytale mash-up Duology. Emphasis on "mash-up" because these tales don't always follow the originals, which I enjoyed. It felt original, regardless of enlisting well known characters and stories.  
In The Deathly Grimm, we meet new characters and find our MCs in the middle of more mysteries/adventures that weave seemlessly within the overall plot of The Forest Grimm. Clara and Axel's relationship is expanded on throughout another bout of drama, AND we get to see some favorites from TFG.
The audiobook, narrated by Sarah Ovens, is perfection. Her voice lends to the whimsy of the tales, setting, and is my preferred medium of consumption.
My one criticism is that Purdie used "my S-curve" toooo many times. Like 12 times! 🙈 I don't recall this being such a distracting substitute for back (part of a back) in the first book? Anyhoo, thats legitimately why TDG wasnt a full 5 star read for me. Still loved it and will be adding to my shelf.

Thanks to NetGalley and St. Martin's Press | Wednesday Books for the eARC and Macmillan Audio | Macmillan Young Listeners for the advanced audiobook!