Junos OS Portable Libraries: https://www.juniper.net/documentation/resources/index.html
Day One Library: https://www.juniper.net/uk/en/training/jnbooks/day-one/
DO Internal: https://forums.juniper.net/t5/Day-One-Books/bg-p/Day1Books
Day One Posters: https://www.juniper.net/uk/en/training/jnbooks/day-one/day-one-posters/
Learn About: https://www.juniper.net/documentation/en_US/learn-about/index.html
( SDSN: https://www.juniper.net/assets/uk/en/local/pdf/books/learn-about-sdsn.pdf )
Books on other web site:
http://ebook.konfigurasi.net/Juniper/