What is the best way to start searching?

Look at the Search Options, for example, Author, Illustrator and Publisher.

To discover what the database holds for these, try these three examples, one by one, by typing these into the boxes labelled in bold:

Author type in Margaret Wild
Illustrator type in Bob Graham
Publisher type in Allen & Unwin

This search will retrieve all books by this author, this illustrator and this publisher provided that they appear in the database. They do!