"When China Ruled the Seas" is written in a professorial tone, accompanied by many historical references and details. The author has no apparent bias; rather, the writing is that of an educator, attempting to convey the substance of a subject that is probably obscure to many. The information, though sometimes heavy and cumbersome in nature, is in the main written with clarity. Even though the book covers roughly one-thousand years of Chinese maritime history, there is enough detail to understand what unfolded during that time but also not so much detail to cause one to get lost in the minutia. The author maintains a good balance between information and clarity and pace.