Thats a great little booklet that many bushwalkers around the country could use in times of help. We have all seen on the news bushwalkers who get lost on what would be easy marked trails. I think you should really push on to get this booklet published there is a wealth of information there that every bush walker should know. Not all areas have internet access and not all bushwalkers can carry a laptop and satellite dish
My suggestion would be talking to some of the publishers of books etc... and since its also to do with a bit of Astronomy you could speak with William-bell (Astronomy book publisher) too. It may take a bit of rearranging of the text but I am sure it would be very worthwhile, not only fro you and your wallet, but also to the many bushwalkers out there that wish they had more than a GPS with flat batteries. Good luck.