I assembled the three models. The moon globe is straightforward and satisfying. The other two models are interesting. I enjoyed assembling them and working with them. The mini-book is a tiny bit incoherent and several pages of its discussion of tides were more or less incomprehensible to me. Otherwise I would have given the book five stars. It's not a straightforward task to come up with the ideas for the models (except in the case of moon globe), and then there is the work of implementation. One of a kind!

Note: It turns out that the equation of time changes a good bit as the years go by, so the equation of time reference card is certainly obsolete.

Project: Figure out how these models were layed out by the authors, so that I could lay them out myself. ( )