I very much enjoyed this book, it is in the Dowser world
This the 4th book in the amplifier series and book 21 of Dowser series dont start here if not read the rest.
Below is the reading order though you can read this before but nice to read in order
1. Cupcakes, Trinkets, and Other Deadly Magic, Dowser 1
2. Trinkets, Treasures, and Other Bloody Magic, Dowser 2
3. Treasures, Demons, and Other Black Magic, Dowser 3
4. I See Me, Oracle 1
5. Shadows, Maps, and Other Ancient Magic, Dowser 4
6. Maps, Artifacts, and Other Arcane Magic, Dowser 5
7. I See You, Oracle 2
8. Artifacts, Dragons, and Other Lethal Magic, Dowser 6
9. I See Us, Oracle 3
10. Catching Echoes (Reconstructionist 1)
11. Tangled Echoes (Reconstructionist 2)
12. Unleashing Echoes (Reconstructionist 3)
13. Champagne, Misfits, and Other Shady Magic (Dowser 7)
14. Misfits, Gemstones, and Other Shattered Magic (Dowser 8)
15. Graveyards, Visions, and Other Things That Byte (Dowser 8.5)
16. Gemstones, Elves, and Other Insidious Magic (Dowser 9)
17. The Amplifier Protocol (Amplifier 0) – bundled with Close to Home (Amplifier 0.5)
18. Demons and DNA (Amplifier 1)
19. Bonds and Broken Dreams (Amplifier 2)
20. Mystics and Mental Blocks (Amplifier 3)
21. Idols and Enemies (Amplifier 4)
22. Misplaced Souls (Misfits of the Adept Universe 1)
23. Awakening Infinity (Archivist 0)