I love Wally and Grommy, they are great guys, and I am 28 years old.
Jokes aside, this book was an enjoyable and insightful look into the process of making an Aardman film; which I'd recommend to anyone who enjoys Wallace and Gromit, is interested in behind-the-scenes information, or wants to gain an insight into the various stages of their art pipeline.
While the writing can sometimes feel like an extended magazine article, it really does cover a lot of ground in an accessible way! Showing how impressive Aardman is as an animation house.
It's really impressive how much they do internally, from CGI to prop creation.