The Last Spell (The Thickety Series, Bk. 4)

Kara and Taff have discovered that the Spider Queen is searching for Princess Evangeline's grimoire. But this isn't just any grimoire - it is the Vulkera, the first grimore ever made. Any witch who wields its dangerous magic would be indestructible. To stop the Spider Queen, Kara and Taff must find the ancient weapon first.

Accompanied by an unexpected companion, they will travel through time, come face-to-face with guardian creatures, and unravel a king's dangerous secret before one final battle against the Spider Queen. Kara knows that everything that has happened since the day she stepped into the Thickety all leads up to this: her last chance to save the people she loves.