Introduction to Space Flight Book

A lot of excellent material and a handful of not-so-hot selections. This anthology of articles, mostly by scientists and engineers many of whom also write science fiction, examines multiple possibilities in terms of both technologies and destinations.
A few overlook some obvious holes in their reasoning, but most are thought-provoking and solidly put together, especially the work of Dr. Robert Zubrin, which is exhaustively provided with hard science down to the detailed equations and inputs. Other authors look at economic and social concerns, so it's a balanced overview, addressing possibilities throughout the solar system, in interstellar space, and ultimately around other stars. Makes me wish I was my grandson's age with at least a plausible possibility of seeing some of the places discussed.