The Witches of the Crossworlds Books I - III - Graham Davidson - Bog

Mid-19th Century, Australia, Blue Mountains.
Ten-year-old Patsy rescues what she believes to be a fairy from a spider web, triggering a sequence of events that challenges everything she's ever believed about herself and the world around her.
A perilous journey into the realm of an evil spider queen brings three generations of witches together. On their own, their power can be contained. Combined, they're more powerful than any of them could have imagined.
In the ensuing years, Patsy will find herself travelling through myriad crossworlds-universes that coexist with our own-and battle against creatures that defy existence, including giant catapillars excreting acidic venom and god-like beings whose motives are never what they seem.

She'll be forced to mature into a role she never wished for, and which her mother had tried for years to protect her from, as the inevitability of her destiny unfolds.