NMLP P-017550 · True-first precedence · minted 2026-07-04

Mercy Watson to the Rescue (Mercy Watson 1)

Kate DiCamillo · Candlewick Press (Cambridge, MA) · 2005

US Candlewick edition is the true first (2005). Kate DiCamillo is a US author and Candlewick is a US publisher, so there is no competing UK or Canadian precedence. First entry in the series.

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New Mexico Literacy Project — True-first precedence NMLP P-017550 for "Mercy Watson to the Rescue (Mercy Watson 1)" by Kate DiCamillo (https://newmexicoliteracyproject.org/id/point/p-017550, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).