Middle Grade series: main character is a "fixer" and has to fix sleep, it's been broken

[Allison]

Middle school novel read sometime between 2008-2014? I believe it was a series, or at least had 2 books. I think the main character was a boy who was part of a secret society/second world where they fix things. One books revolves around needing to fix sleep or fix bad dreams. Wrench on the cover, navy blue tones. I feel like the group/secret world is called fixers/repairers/etc

[Becca]

The Seems series by John Hulme and Michael Wexler. The first book is called The Glitch in Sleep.

[Lobstergirl, au gratin]

Allison, was that your book?