Hey,
You can find most of the books you need online on Amazon and flipkart. You can go through your syllabus and find out the books you want to purchase.
Here are links where you can find paid and free ebooks:

• https://www.ebooks.com/en-in/subjects/hospitality-studies-hotel-management-ebooks/3570/
• https://hospitality.careers360.com/download/ebooks
• https://www.google.com/amp/s/www.soegjobs.com/best-hotel-management-books-free-paid/