Why only spiritual books are called Holy texts

Literature on subjects other than Spirituality that is from the Great Illusion (Maya) does not last for long because the Great Illusion has an end. On the contrary spiritual literature being in the context of Brahman (God) which has no beginning and is infinite also lasts eternally. That is exactly the reason why holy texts like the Vēdas, Upanishads, Darshans, Mahābhārat, Yogavasishtha, Rāmāyaṇ, Gita, Bhagvat, etc. have stood the test of time for thousands of years and other literature which has even won laurels like the Dnyanpith award in India and the Nobel prize has not survived for long.