As to copyright, you aren't posting the entire book so should be ok, and the recipes are not being made available for resale or profiteering, just sharing them in a public forum. It is arguable that we are sharing among friends if we want to analogise it that way, as we would do in person. I will make a note to check out the Copyright Act 1968 (Cth) to see what the go is with this or if we're breaking any laws.
The worst thing that can happen is a demand to stop posting her particular recipes, but because we are of the www, there is so much information posted that there are no definite rules & regulations, as internet law is very ambiguous.
In regards to each individual recipe that is added from a particular recipe book the best bet (if you want to play it safe) is to reference it: (Authors last name, initial. Year of publication. Title of book, Publishers, Place of Publication.)[i
GW1 - 70kgs
GW2 - 67kgs
GW3 - 60kgs