If you're looking for a comprehensive book on the history of photography - this is the one. It'll not only take you for a journey through the most important names and their works but also show the development of technology.
Sure, one could say that the narrative is a little dry but it's a matter of what you're looking for. If it's all about an engaging, anecdotical non-fiction that will give you facts as a side-effect (sort of), it's certainly not for you. But the writing style is fine and if you want knowledge, you'll be more than satisfied.