I'm not vegetarian, but really like these:
Forest Feast - also the book and food are beautiful.

https://www.amazon.com/Forest-Feast-Simple-Vegetarian-Recipes/dp/1617690813/ref=sr_1_1?crid=1GVCH7PHBMLHR&keywords=Forest+Feast&qid=1641054244&sprefix=forest+feast%2Caps%2C126&sr=8-1

https://www.amazon.com/Forest-Feast-Mediterranean-Vegetarian-Inspired/dp/1419738127/ref=pd_bxgy_1/135-5584870-1331523?pd_rd_w=983eF&pf_rd_p=c64372fa-c41c-422e-990d-9e034f73989b&pf_rd_r=QES3WAAEN15AGKY08T0N&pd_rd_r=948948dc-22da-4c08-bf06-59c070441b76&pd_rd_wg=4cA45&pd_rd_i=1419738127&psc=1

Plus any recipe by Ina...

Weeknight Vegetarian

+1 for Deborah Madison, especially Vegetarian Cooking for Everyone (which, in spite of the title, is really just vegetable focused).

I like all of Ottolenghi’s and Sami Tamimi’s books. Heavy on vegetables but also enough to keep everyone happy. I also like:
Deborah Madison
Mollie Katzen
Milk Street Vegetables
Vegetables Unleashed by Jose Andres
Lucky Peach’s Power Vegetables
VB6 by Mark Bittman
Mostly Plants by the Pollan family
Six Seasons: a new with vegetables by Joshua McFadden
On Vegetables by Jeremy Fox

So what are your go to vegetable cookbooks. Not looking for vegetarian cookbooks. I am looking for new ways to cook vegetables and new vegetables to cook.

I got this book and liked it.

Vegetable Literacy: Cooking and Gardening with Twelve Families from the Edible Plant Kingdom
https://www.amazon.com/Vegetable-Literacy-Gardening-Families-Deliciously/dp/1607741911/ref=sr_1_21?crid=1IM391TBUKJV2&keywords=Cookbook+Vegetables&qid=1640700662&sprefix=cookbook+vegetables%2Caps%2C56&sr=8-21