The Heir of the Thunderbird
by May-Britt and Martin Braendstrup
The Heir of the Thunderbird is the first of three books in The Glass People series
At the age of 16, Victoria discovers that maybe the strange condition that causes her bones to break like twigs is not osteoporosis, but a legacy from her late father's ancestors. However, by then she is already tangled up in an intricate web of old legends and secret organizations.
In order to find out who she really is, she must seek out her father's family in Canada, and face her Indian ancestry.