WW, there isn't much on the pre-Isuan period because not much is known about it except by extrapolation from meteorites and moon rocks and a few bits and pieces of rock which may or may not be as old as they are thought to be. The Isuan itself was defined when some gneiss rocks from the Archean period were found in Greenland. These are the earliest rocks found on Earth, I think, although you're now stretching my memory here although not quite for 4.5b years.
There is still, I think, some argument about whether any of the pre-Cambrian "divisions" actually mean anything in terms of time lines, since there is no meaningful way of dating the rocks. Most of the dating for later geologic periods depends very much on the fossil record. No fossils, no "accurate" dating. Therefore anything earlier may have been in the proposed sequence, or they may all have existed together.
I hope your library can help!
