Western Australia is covered in 4 parts

 

North and West of the Swan River , by Greg Thurston  Book Greg Here

South and West of the Swan and Canning River by Anthony Chudleigh  Book Anthony Here

Eastern zone South and East of the Swan and North and East of the Canning Rivers by Ric McDoald  Book Ric Here

Rockingham Mandurah by Brad Sutherland  Book Brad Here