Hello Student

You can download the PDF of the book from the official site of NCERT.

the website has a PDF of all the books from class 1 to 12 of all subjects in all languages.

if you want to download a certain chapter of book you can also do it there or

you can visit the given link below to download the PDF of your science textbook

https://www.google.com/amp/s/school.careers360.com/ncert/ncert-books-for-class-9/amp

Good luck.

Hi,

You can download it from the official website of ncert which is mentioned below. You can the book chapter by chapter. Just the website, just select the Class , Subject,  select the book title. You'll be able to download it.

https://ncert.nic.in/textbook.php?jesc1=9-16