I have seen a video of a shaikh who explains that the reason for Allaamah Anwar Shah Kashmiri's strong memory was his great adab (respect) for the Boo

Answer

Firstly videos are haraam. The modernist shaikh who appears on video is guilty of publicly indulging in haraam, hence his fisq is confirmed. One should not attach credence to the word of a faasiq. Besides Hadhrat Allaamah Anwar Shah (rahmatullah alayh), there were innumerable Ulama, Auliya and Fuqaha who had the utmost respect and love for the Books of Islam, yet they did not have photogaphric and prodigal memories such as Allaamah Kashmiri. The simple explanation is that Allah Ta'ala had bestowed to him such a wonderful memory. It is a pure gift of Allah Ta'ala for which there was no cause emanating from Hadhrat Anwar Shah (rahmatullah alayh).

It is permissible to kiss the Books of Hadith and Fiqh. Among the etiquettes of respect is also to be with wudhu when touching these books.