It could also be as simple that the earth descriptive book is protected similarly as the gaternay book was. If the escape to d'ni was planned in such a way that all who were from ronay fled into their books, whose to say that if the descriptive books kept there were safe or destroyed, more to the point, would it matter to those already there. For instance, in BoA, when Ghen destroys the world with removal mark and Atrus links back to it, he only sees a link to a world where he had never been, BUT, thats not to say that the world he had been to doesnt exist anymore, only that the link it is no gone. Since he described the books as link to worlds in time which are already there, if the ppl on D'ni were already there when the descriptive book was destroyed, that doesnt mean that that world is necessarily destroyed, only that there is no link back to it the way the person outside of the book saw it. BECAUSE, the world was already there. The descriptive book didnt create the world, just established a hard link to a world that already existed. Now linking books instead of descriptive books would no longer function, because linking books only connect to the descriptive book; if the descriptive book is destroyed, hence the linking books for it would cease to function. But descriptive books dont create, they ONLY link to somewhere already there. So while the chance for an Earth book to exist and be tampered with is a possibility, would the change have an effect on us or a similar us. Personally I feel that the earth book is either protected far from the hands of intervention or that it was destroyed only after ppl had linked to it. that way no other link could be re-established to the same point and time to which the original writer had conceived. protecting the land from interference of those who may have remained in ronay.
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If you are not part of the solution, then you are a gas.
