The best books for your personal and intellectual growth are those that challenge your views, putting forward the arguments with which you don't initially agree in a convincing way. Either they win you over, or tbey sharpen your powers of argumentation for your original view, and likely they help you to a more nuanced understanding of the matter at hand. Sadly, Nuclear Power Is Not the Answer is not one of these books. As I have been committed to the cause of de-nuclearization of energy generation many years, the book did not challenge my views, and I did not gain much in arguing for my conviction as Caldicott makes an incoherent case for it.
Let's begin with The Good: The subject of nuclear power is worthy of examination, and it is also commendable to write a concise introduction which contains all major arguments against its use. Caldicott is also qualified on the issues, stemming from her background as a decade-long anti-nuclear activism and her professional training as a physician (not coincidentally, her expertise shines most when writing about the medical hazards of radioactivity). As the issue of civilian and military nuclear energy use and its dangers is still politically unresolved, the book is also relevant to many current headlines - from Iran's and North Korea's nuclear programs to the Fukushima reactor catastrophe (Caldicott once spends a sub-chapter specifically pointing out the dangers tsunamis could pose to oceanside nuclear plants like those in Japan).
Sadly, this is outweighed by The Bad: The book is badly written, in a way that the author is much more used to speaking than writing. That includes repeating specific information in the sentence right after the one where it was given, and the very liberal use of affirmative ("We know for a fact" instead of "We know" etc.) and sometimes outright manipulative (describing chemical elements as "diabolical") language. The argument put forward is incoherent - the individual parts make sense, but they are not properly synthesized. Sometimes, there are inherent contradictions, for example when Caldicott argues in one chapter that reducing America's dependence on oil will not do much for its electricity generation (correct, as oil does not contribute much to that), and in another that instead of spending billions on wars in Afghanistan and Iraq to control the oil (notwithstanding that Afghanistan neither has oil resources nor adjacency to pipelines), America should rather invest the money in renewable energy generation. More often, data is taken from a lot of different sources, but every individual data point is just thrown at the reader instead of being put into context. Caldicott barely explains what "normal" amounts of radiation are, nor does she differentiate (or explain) the difference between radioactivity and radiation doses. Sometimes, the data from different sources is also contradictory. In one especially egregious instance of confusing treatment of units, she switches units from one page to another from gigajoules to petajoules, just to give a number of 0.000555 petajoules (which would have been more elegantly rendered as 555 gigajoules).
Finally, The Ugly: There are some (as far as I can tell) rather inconsequential factual mistakes. For example, Caldicott names Manmohan Singh as the president of India (he was, in fact, prime minister). More importantly, the confusing and sometimes incoherent data is never put into any graphs or tables to visualize or compare.
Nuclear power is not the answer. Neither is this book.