Shelly’s books are available at all good bookshops and can also be purchased on-line.
Within Australia
http://www.booktopia.com.au/search.ep?keywords=shelly+unwin&productType=917504
https://www.bookdepository.com/search?searchTerm=shelly+unwin&search=Find+book
https://www.dymocks.com.au/search-results/?str=Shelly%20Unwin&IsAdv=false
Internationally
https://www.bookdepository.com/search?searchTerm=shelly+unwin&search=Find+book