I strongly recommend "The Tangled Tree: A Radical New History of Life" by David Quammen The old metaphor of a tree of life has completely broken down with cros

I strongly recommend "The Tangled Tree: A Radical New History of Life" by David Quammen The old metaphor of a tree of life has completely broken down with crosslinks everywhere at all levels, far beyond what even Barbara McClintock wrote about. It's not completely true (but in the area what is "completely true") that only the mitochondria and chloroplasts are captures or symbionts. Flagella and cilia are examples of others! Though technically they aren't considered organelles. The book I mentioned above is really good! It doesn't simply talk about how current understanding has momved beyond the tree metaphor, it talks about how that came about, as well. Of course, being a book for the general public at talks a lot about the people involved too.