There are three highly recommending texts (in order)…
The Complete Carpet Python
by Nick Mutton and Justin Julander, PhD.
2nd Edition with a special chapter on advanced reproduction by Dr. Benson Morrill.
The first edition is still very much worth getting.
A Guide to... Australian Pythons in Captivity
by Adam Elliott
Published: 1st August 2014
ISBN: 9780987244772
Keeping & Breeding Australian Pythons
Edited by Mike Swan
Prices vary from $80 down to around $45, depending on whether it is a hardcover or soft cover version and which text it is. Availability is the hard part. You can try second-hand booksellers as well as retailers of new books. You may be able to take them out on loan from your local state library to check them out first.