Many university subscriptions include e-books. Check your library portal. You might not get Ho & Agarwal specifically, but you will get Kapoor’s text in digital form.
While many textbooks focus on Western jurisprudence, International Law by Dr. S.K. Kapoor (often referred to colloquially as "Ho & Agarwal" after the publisher’s series editors) is the gold standard for law students in India and South Asia. It bridges the gap between the UN Charter and the realities of developing nations. ho agarwal international law pdf
But as a responsible law student, you understand the importance of IPR (Intellectual Property Rights). Do not steal the work of Indian publishers trying to educate the next generation. Many university subscriptions include e-books