While the deadlines have passed to download the following titles free-of-charge from SYNC, one can still download those audiobooks' perpetually free reference guides:
Audible has posted the link under the audiobook's Publisher's Summary on
this page, which link directs one to
this downloadable, 11-page PDF document.
Audible has posted the link under the audiobook's Publisher's Summary on
this page, which link directs one to
this downloadable, 13-page PDF document.