EMBER-2 wants to read (absorb?) some books on human psychology.
"Books are stored in the host corresponding to the first digit of their call number, while a book's file ID is 200 plus the last two digits of the call number. For example, book 512 would be stored in the host 500-599 as file 212. Duplicate each of the books requested by EMBER-2 and bring them back to your host. The call numbers for the books EMBER-2 wants are available in file 300. Note that EMBER-2 will never request more than one book from the same host."
- Although it is not very clear, the book hosts are arranged in a zig-zag formation with link 800 moving forward along the zig-zag and link -1 moving backwards.