I'm unable to recommend a 'flock novel' because the concept is so unclear. However, if we assume it's about groups or 'flocks' of characters, you could explore novels that deal with large groups of people or animals in a collective sense. Maybe some post - apocalyptic novels where groups of survivors band together like a flock for survival could potentially be related, but this is just speculation.
Sorry, I don't know of any specific 'flock novel' to recommend as the term is not a common genre or well - known type of novel that I'm aware of.
Since I'm not sure exactly what a 'flock novel' is, I can't recommend any. But if it's related to flocks of animals, you could try looking for novels about wildlife or nature that might include stories about flocks. For example, some books about bird migrations might be somewhat relevant, though they may not be exactly what a 'flock novel' is supposed to be.