A new moth book has been written by David Beadle (co-author of the Peterson Field Guide to Moths of Northeastern North America), Michael King and Phillip Holder:

ONTARIO MOTHS: A PHOTOGRAPHIC GUIDE, VOLUME 4
Hawk Owl Publishing
They are taking pre-publication orders at a discounted price until August 15, 2023.
For sample pages and ordering, go to:
https://mattholderfund.com/product/ontario-moths-volume-4/

This is part of a projected four-volume series that is to cover, if possible, all moth species recorded in Ontario. By comparison, the Peterson Field Guide covered only about half of these species (since it was only one volume).

The first volume to be published, which covers Noctuidae and a few odds and ends, is called "Volume 4" because the species in the book are last in the normal taxonomic ordering. It covers 643 species and includes 800 colour photographs. Moths are shown in natural resting positions.