This book was okay but it wasn't great. The people who were covered were covered pretty interestingly, and the overall design was generally good, with good images, layout, etc. (except that there are a lot of timelines that are not to any scale which annoyed me).
The real problem with this book is the choice of who got included: almost all (especially in the 1700s-on) are European or American, and all but one are male! The book also buys into the myth that nothing interesting got done in the European Middle Ages, which given the invention of gothic cathedrals and stuff is pretty clearly false. I would have liked to see more diverse ancient engineering, including pre-Columbian engineering in the Americas and engineering in Sub-Saharan Africa. I would also have liked more diversity in the more recent (say, 1800's-on) engineers. Like, more than one woman, and some non-white folks.
I also would have liked a little more on the negative side of some of these inventors/their inventions. Like, was the guy a Nazi or a slave-owner? Say so! Or how the cotton gin really contributed to a resurgence of American slavery.
Overall the book was interesting and informative but it could also have been much better.