Y/n Lykensen and her pack

Y/n lykensen is Wyatt and Willa Lykensen's younger sister (much to y/n's annoyance)
After their parents die the responsibilities of the pack is left to Willa. As more and more of the pack gets sick, the mission to find the moonstone continues.
Will they find it? Will it be too late?
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This is my first book, so I'm sorry if it's a bit crap.