Does touching dry ritual impurity with the hand transfer its smell, and is the presence of its smell on the hand proof of the existence of the impurity, and is it permissible to touch religious books with this hand?

What we understand from the words of the scholars dictates that the smell of a neighboring impure substance does not harm, nor does it affect the purity of the substance adjacent to it, especially if it is not in direct contact with it. Thus, if water changes due to the smell of a carcass at its edges and shore, this does not prevent performing ablution with it. If it had changed due to the carcass having fallen into it, that would have rendered it impure due to admixture, whereas the former is merely adjacency, which is not relied upon. Change due to a neighboring substance that is not in direct contact does not harm at all. As for change due to a neighboring substance that is in direct contact, it harms by consensus if the change is in color or taste. Regarding a change in smell, there is a difference of opinion, and the relied-upon view is that it does harm. Change due to admixture harms absolutely by consensus. If a hand has the smell of impurity due to its proximity to an impure substance without direct contact, then it remains pure. However, if there is direct contact with the impure substance, there is a difference of opinion. One should not touch books of knowledge, or the like, with an impure hand; this is out of reverence for them and to avoid disgracing them.