To me, The Plant-Powered Diet by Sharon Palmer, RD, is one of the best places to start. This book covers everything. Chapter by chapter it walks you through the world of whole plant foods. My favourite part of the book is the numerous, easy to read charts that lay out for you the best choices in every category (proteins, non-dairy milks, etc.) She also includes a template for a food journal that helps to ensure you're getting all of your recommended servings. Another great feature of this book is it's not just aimed vegans, it is aimed at everyone including people who eat meat but want to add more whole, plant foods to their diet. Tons of recipes to get you started.
The 30-Day Vegan Challenge by Colleen Patrick-Goudreau is just that, a 30 day challenge. In one month, this book will take you from omnivore to herbivore. Not only does it give you invaluable information about veganism, but it helps you make the change gradually rather than all at once. Each day comes with a few little challenges/changes you can do in your life to make your journey to a plant-based diet easier. I also like how she addresses how to deal with the people around you when you do it, because I know I encounter a lot of misunderstanding when I refuse meat from others. Comes with a lot of great recipes and photos, my family ate the Apple Cobbler up.
Kind Life website are one of my favourite tofu dishes.)
So, if you're thinking of committing to a plant-based diet or just looking for more ideas for meatless meals, I highly recommend picking up these three books.