'Forgive me, but I disagree.'
'Books in one form or another' is a dodgy phrase. A kindle is a book 'in one form'. There is, arguably, just as much difference between a kindle and a modern printed book as there is between a manuscript and a modern printed book, or between a manuscript and a scroll.
So in that sense, no, books really haven't been around for millenia.
And they certainly weren't available 'to the masses' from the fifteenth century.
Forgiveness not needed, you can disagree all you like. The point I was making is that you can’t compare a physical book to a CD, CDs have had a teeny life span of three decades whereas physical books have been around for centuries. Printed books will become a more specialist field as the decades go on but I highly doubt they will ever be obsolete.
I believe the oldest book in existence is the Chinese Diamond sutra although I may be wrong there, it was printed in 500AD (?) so printing has really now spanned two millennia. And by availability to ‘the masses’ obviously I’m referring to the printing press and yes, I'm aware peasants weren’t receiving a weekly paperback to enjoy with their mug of mead but books were far more widely available than ever before.