This cache is not at the posted coordinates.
To find this cache, you must complete the Street Libraries Adventure Lab. The five locations for this Adventure Lab are around Springwood, Winmalee and Faulconbridge, with each location being one of the many street libraries in the Blue Mountains.
Once you complete the Adventure Lab, you will receive the coordinates for this cache.The listed coordinates for this bonus cache are for yet another of the local little libraries. The actual cache is quite close to there.
To complete an Adventure Lab, you need to download the app for your smartphone from your app store. Login using your regular geocaching name and password, then search for the nearest Adventure Labs in your area.