A list of every guide book I know of that includes overnight walks. Some are out of print and only available in libraries or as second hand books.
Information is minimal - some overnight walks are described in detail in the guides to Australia.
Kakadu and The Top End, (1st edition), by Mattias Breiter, published by Kangaroo Press, 1996, ISBN 0 86417 647 3. Primarily a tourist guide, there are only 4 pages on bushwalking but as it's the only advice, it's worth reading. There are no track notes, only advice on conditions and how to obtain a permit. Out of print, price was around A$20.
Larapinta Trail, (1st edition), by John Chapman and Monica Chapman, published by John Chapman, 2008, ISBN 978 1 920995 04 1. Detailed track notes for the 20 day walk along the MacDonnel Range near Alice Springs. Includes track notes for both directions along with colour topographic maps. Price is A$29.95
Take A Walk in Northern Territory's National Parks, by John &
Lyn Daly, published by Take A Walk
Publications, 2006, ISBN 0 9577931 5
4. While most walks in th eguide are one day long, nine are multi-day
walks. Notes ten dot be brief but adequate for expereinced walkers. Not
all maps have maps and when provided they are very simple sketch maps.
Price is A$29.95