Much advice in books is given with the assumption that you have dug soil and then have added, in this case you are quoting, fresh manure. Mixing, incorporating manure into dug soil can cause forking, hence some advice against using it. Also fresh manure is not good for most plants, but they need to say how fresh they mean, I advise using manure more than a year old. (or younger as mulch around courgettes, squash)
However I find that carrots and parsnips love to grow in beds with plenty of compost and old manure, and grow well, when the manure is dark and reasonably crumbly. I have not found any vegetable disliking to grow in compost and older manure.