I have just finished a complete draft of my book Nature and Nature’s God: The Scientific and Philosophical Validity of Aquinas’ Proof of an Unmoved Mover. An updated table of contents is available at my writings page.
In the book I give the most in-depth exposition of Aquinas’ First Way ever written. I connect the argument to the other motion proofs in the Summa contra Gentiles, as well as the Third Way, and devote a whole chapter to the Fifth Way as well. In the second part of the book I tour the history of science, showing how physics has never conflicted with Aquinas’ argument, but rather supports it. Thomists do not need to reject inertia, but embrace thermodynamics.