Although I do think that Lisa Westberg Peters' Our Family Tree: An Evolution Story is generally an adequate enough basic introduction to the concept (to the theory) of evolution for children, I both personally and academically have definitely found that the author's striving to keep her text simple and not too informationally involved has actually (at least to and for educated adult me) made Our Family Tree: An Evolution Story potentially confusing and perhaps even more than a trifle misleading at times (especially with regard to scientific facts and truths about the geologic and biologic history of our planet, of the Earth). For while I am most definitely a strong believer in evolution (and am totally against any form of active biblical creationism, albeit I do believe in God and that deistic or perhaps even theistic evolution might in fact be what my belief is and entails) I do have rather massive issues and misgivings with the fact that Lisa Westberg Peters' seems to show life and how we have developed and changed as a species over time as some kind of straight and sequential timeline (as almost all of the science based books on evolution I have thus far read do generally NOT as a rule consider it as something that is inherently linear and therefore always moving forward in a straight, non-branching manner, and for the author to present evolution as such, while I guess it could perhaps make said concept easier for the intended audience, for the so-called picture book crowd to fathom, this is also in my opinion very much inaccurate and as such obviously not all that scientifically sound).
Combined with the author's rather (personally) annoyingly frustrating tendencies to leave out, to not even consider mentioning a number of important and indeed also quite essential facts and details of our planet's history, such as for example only showing one of the many supercontinents, which does indeed kind of makes it appear as though Pangaea is the only supercontinent to ever have existed on Earth (and which is in fact and indeed totally, utterly false) and that Lisa Westberg Peters also only presents ONE of the mass extinction events to have occurred throughout the Earth's history and then not even the most serious, the most inherently destructive to life itself (namely that she describes the K-T boundary event that wiped out the dinosaurs, which might well be the most famous and certainly did herald the advancement and domination of mammals, including primates, including us, but basically is pretty much a rather mild to medium mass extinction event when compared to say the Permian-Triassic extinction which almost destroyed life itself) I really cannot justify ranking Our Family Tree: An Evolution Story with more than two stars (although I do very much love Lauren Stringer's brightly descriptive full page accompanying illustrations and even Lisa Westberg Peters' text is a decent enough starting point, but one that in my opinion would definitely and yes absolutely require discussion and supplemental information to fill in the author's problematic informational gaps).