Rather than repeating other reviews, I want to add to their comments (which I generally agree with so far).
After reading much about Africa, I found Hallet's perspective to be very refreshing. He is a realist from another era, and he does not suffer from the flowery and politically-correct language of more recent writers. He is a product of his time, and his uninhibited thought processes might ruffle a few of the more prudish feathers among us. But for example, his overt racial profiling is very insightful and enlightening at times, regardless of what people may or may not want to hear. For example he gives a no-holds-barred take on the Hutu and Tutsi people and what really makes them different, both in terms of how Hallet perceives them, contemporary stereotypes, and importantly, how they see themselves. These are things you just cannot find in more modern writings about the Rwanda Genocide for example. He provides apt observations about many other ethnicities throughout his travels that may simplify on one hand, but also helps to enlighten on the other. There are differences between the tribes and peoples of the continent, but it seems that more modern writers are loathe to point them out or offer simple anecdotes for fear of offending someone.
He is not afraid to sleep with the chiefs very young daughters and he is not worried about how his opinions will be perceived. That being said, he is not just a brutish chauvinist and racist charging his way through Africa. But to the extent that he was born in 1927, he may be a little of that, compared to modern norms and practices.
He also gives a somewhat unbiased view on what the Belgian Colonial system was actually doing in the Congo, at least by the 1940's and 50's. I think this helps to gain a somewhat more balanced view of imperialism, especially with horrible episodes like King Leopold's Congo painting every other colony with the same shameful brush. Some colonies did have tangible benefits for the people living under them, but the topic remains very controversial.
On the whole, Jean-Pierre Hallet is a very intelligent, positive and sensitive man. He is inquisitive and thoughtful and knowledgeable. You will certainly grow fond of his indomitable, yet lovable character as soon as you read his words. He was a magnificent person.