The main aim for the authors explained in the introduction is to build a definition of what constitutes life as clearly as they can, and on this regard they definitely deliver, building up different features of the cell and how those elements can translate into a definition of livingness, adding examples, references and putting everything in a solid and pleasant way to read.
The late part of the book however, talking about other aspects such as human intelligence and the concept of the mind feels a bit lacking in comparison, since knowledge of this areas is not developed as well, but also because trying to suit their life model into the concept of the mind seems forced and with not enough evidence to make a convincing case. It's still interesting anyway, and did enough to awake my curiosity on the topic.