Harper sets the Wolfwalker books on a world settled by humans who then lost most of their technology. One thing they do have, or at least some of them do have, is the ability to communicate telepathically with wolves. Something else some of them have is the ability to heal telepathically. The books are excellent reading, with adventure, intrigue, a little romance, and occasional technological gadgets sprinkled in for good measure. The two books about Tsia are possibly set in the same "universe" as the Wolfwalker books, but on a planet that is still in touch with the universe at large, and still in possession of a high level of technology. Also included is a possible explanation for the telepathy with animals found in the Wolfwalker books. I highly recommend any book by this author, with the exception of Wolf's Bane, which was okay, and worth reading, but not good enough for me to highly recommend it..