There are 4 books in the The Sisters Solstice series. The newest book is Summer of Sacrifice which came out in 2024.

1
Autumn of the Grimoire

Book cover of Autumn of the Grimoire
Some witches cast spells. Others slay kings.A mysterious Grimoire. A marriage full of dark secrets. A History sculpted by a quartet of ancient Sister witches.For three hundred years, Sister Autumn has incited wars, burnt villages, killed kings, and released plagues at the bidding of the Grimoire. Meanwhile, her Sister Winter,…
When you buy books, we may earn a commission that helps keep our lights on (or join the rebellion as a member).

2
Winter of the Wicked

Book cover of Winter of the Wicked

Some witches cast spells. Others sacrifice everything.


A Sister forced to do the unthinkable. A kingdom on the brink. A quartet of witches intent on altering History.


For centuries, Sister Winter's life has been dictated by a Grimoire-the Book her Sister Autumn just destroyed. Despite the necessity of its destruction…

3
Spring of Ruin

Book cover of Spring of Ruin
"There was nothing like the buzz of poison and murder in her veins." -Sorscha
As the Joubert Sisters navigate a world of impending war without their full magic, the Prince of Bone fights for his life-torn between the land of the living and the land of the dead-only to discover…

4
Summer of Sacrifice

Book cover of Summer of Sacrifice

The end is nigh.


In this chilling end to the Sisters Solstice Series, much is afoot with the Sister witches, the reaper, and their entire cadre of peculiar misfits.