For nutrition and diet I can highly recommend "How Not To Die" by Dr. Michael Gregger:
https://nutritionfacts.org/book/
Reading multiple books and doing research yourself is to recommend, at least there's one book with a whole website about the research used in each topic. ---> Boundless by Ben Greenfield.
If all the research points to "meat" being problematic, wouldn't a truthful book be considered "anti-meat"? I am a meat lover myself, but Greger seems to follow the scientific process to the letter.
A vegetarian diet may be the healthiest there is - I don't know. But Greger is biased for sure.