Slipstreamers : the island artifact / Ali House.

Cassidy slips between worlds, traveling to bizarre planets and alternate Earths to find extraordinary new technologies and artifacts that might better humanity! When Cassidy finds herself on a planet amidst their Landing Day celebrations, she decides to take part in the fun and festivities. However the fun stops when she tries to examine an ancient artifact of great cultural significance, only to have it go missing and for her to be blamed!