Mario Livio definitely does not pick on someone smaller than he. Indeed, when he decided to write about what he considers scientific blunders, he went after Darwin, Kelvin, Pauling, Hoyle, and Einstein.
The full title of his latest book is Brilliant Blunders: From Darwin to Einstein – Colossal Mistakes by Great Scientists That Changed Our Understanding of Life and the Universe, which is more of an abstract than a title. It would be incorrect to claim that Livio has not laid a glove on any of his subjects, but neither, it seems to me, are all of the errors “colossal.” Still, the book was well worth reading and contains excellent introductory material for those who are not experts in the subjects and even for those who are. The organization of the book is also interesting in that every chapter relates in some way to evolution, whether of life or the earth or the universe, and the transitions from scientist to scientist are relatively seamless.