For about 10 years I basically believed in the literal 6 days, along with the young earth teaching... but a year or so of looking at science and such is strongly showing otherwise.
I just wonder if multitudes of Christians are basically at a stage like the church was at when Galileo was persecuted, and the church held to the geocentric model of the universe... which we now know was 100% false...
also, any recommendations for a solid Christian authored book(s) on the topic?
The best book I've read so far to make the case for old-earth day-age creationism is 'A matter of days' by Hugh Ross. Also on my reading list is 'creation and evolution' by Alan Hayward. I think what's going on today is a reaction by some religious against the attack against the Bible from evolution and geology, from the fundamentalist perspective. It's a strictly literal interpretation of the Genesis. I think it's come about over mainly the 20th century. I don't think it's helpful, as the argument for a 6000 year literal 6 days creation is usually laughed out of court nowadays. I've heard also that in some churches, you have to accept the young-earth creationism to become a pastor. The 6000 years can be shown to be doubtful, because it doesn't take into account that generations can be left out of the geneology, it was recorded for religious purposes, not to estimate the age of the earth. A rigid literal interpretation of Genesis 1, can result in believing that the earth was created before the universe. Young earthism seems to be in the main in the protestant churches, and so is a sort of fundamentalism, to the extent that nothing much is seen as symbolic or allegorical. 6000 year creation isn't supported by the fossil record, you'll never dig up a rabbit and a dinosaur fossil in the same layer, it's always reliable that certain fossil groups are found in specific layers.
also you might want to read 'The Biblical Flood' by Davis A. Young, a case study of the church's reponse to extrabiblical evidence. This explains (as well as many other things) how geology was founded by scientists who were in the 19th century, in the main Christians, and it's not a conspiracy.
And 'Who was Adam? by Fazale Rana, which is a creation approach to human origins, without being young-earth. these books are from the non-evolutionary stand-point, in the main, and they are books that I've read recently to try and get to the truth about creation, the flood, etc. if such a thing be possible.
A lot of semi or non- Christians are very hostile to creationism, because they assume that we're all young-earth creationists, where in fact there are many differing views, including evolutionary-creationism.