If you only know the author, just look it up in the authorcatalog.
如果你只知道作者，那就查作者目录。
2
Have you checked in the catalog under author and title?
你查过作者和书名目录了吗？
3
B: Yes I am. You can check our online catalog to search the book you want based on the genre, title or if you know the author, I can point you towards the right direction.