ok, so i was actually able to quickly grab the end of eternity, the gods themselves & nemesis for cheap at book depository. 

that really just leaves the fantastic voyage (a honey i shrunk the kids type story that asimov rewrote after being asked to novelize a film of. is that required reading? i dunno. i guess it's a trope, and it's sort of worth seeing his view on it, but i couldn't find it for cheap and i don't want to pay for it) and the three silverberg novels.

silverberg is at least still alive...