Heaven's Jewel — J.H. Sweet

Aaron, Patrick, and Christine Wallace are trying to find a way home after surviving the plane crash that killed their parents and marooned them on a mysterious island. Thanks to the manipulative antics of the Time Entity, their quest will take many months and span many lands. Their journey is full of the unexpected. However, events such as encountering trolls and dragons in a magical garden, seeking the mythical Spidersong to free Jewel Trees from a curse, visiting a futuristic city, sailing beneath the Glacier of Dreams, and witnessing the birth of the Time Entity are nothing compared to the surprise of discovering that their actions hold the key to the survival of all of mankind.

The Time Entity Trilogy
 
Heaven's Jewel
The Eternity Stone
Futures Sown
                              
Timeline of Key Events
 
2010:  The plane crash maroons Aaron, Patrick, and     
              Christine on the island.
2036:  The original travelers pay a visit to Ruin Foster's mother.
2077:  The double twins begin their own adventures in Elmara
              Lodés.
2089:  The migration to the island begins.
2115:  The last of the settlers make it to Heaven's Jewel, and the       
              Doorway in the Sea closes.
6051:  The Historian welcomes Aaron, Patrick, and Christine
              on their first visit to Heaven's Jewel.