The "theory" of evolution" stopped being a theory when DNA was discovered and it's role understood. Now it's just the inevitable fact of evolution.
The book you disparaged is written by a real scientist and published by Oxford Uni Press. They are smarter than you, and if it were 1 + 1 = 3, OUP wouldn't have published it. Even if we disregard all this, the fact that you judged a book without reading it says a lot about your critical thinking skills.