Museum of Thieves (Book 1 in the Keepers Trilogy), by Lian Tanner (2010)

Goldie Roth hated the punishment chains.  She hated them more than anything - except perhaps for the Blessed Guardians.

In the city of Jewel, children must be attached to an adult at all times.  Children are also forced to obey the Blessed Guardians.  But once children are 16 years old, they will be unchained on Separation Day.

Unfortunately the Separation Day is cancelled, but Goldie decides to take the opportunity to run away - risking her life as well as the lives of everyone she loves.  She finds herself in the unusual and mysterious Museum of Dunt, where Goldie's life forever changes.

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