The Fragile Threads of Power by V. E. Schwab 

V.E. Schwab takes us on a deliciously adventurous ride back to the world of The Shades of Magic, where parallel worlds exist and a select few can open doors between them. Beloved characters who saved the worlds from disaster in the original trilogy are back to face a new threat, along with some new faces; notably Tes, a young girl who can not only see the physical manifestation of magic – the threads of power- but she can also manipulate them, a talent both incredible and horrifying at the same time.  

Fans of the original series and new readers alike are in for a treat with the gripping fantasy adventure of The Fragile Threads of Power.