Al-Ghazali, The Niche of Lights (ed. D. Buchanan) (oddly, no longer registers on Amazon)The first three are for me and the fourth is to read with my son.
Al-Ghazali The Incoherence of the Philosophers (ed. M. E. Marmura)
Glenn Reynolds, An Army of Davids
Robert A. Heinlein, Red Planet