Personally I like Capstick's writing. I've read most of his works on Africa. He knows how to spin a story and he was pretty practical on equipment recommending the 375 H&H for most people. A lot of his supposed first hand accounts were in fact other peoples stories, but he was the one to put it on paper and he did it well. So take his accounts with that grain of salt and enjoy. Like him or not he spurred a lot peoples imaginations and got them to head for Africa. There's actually a Peter Capstick Library of several books by other authors he edited and republished to give you ideas. If you want a historic read check out The Man-Eaters of Tsavo by Lt. Colonel J.H. Patterson. That's the book the movie Ghost and the Darkness is based on. Interesting read, though the maneater part is maybe 1/3 of the book. Robert Ruark's Horn of a Hunter is legendary, though I've only read Uhuru and The Old Man and a Boy by him, which I recommend. Hemingway's Green Hills of Africa is a classic too. Craig Boddington writes well and is pretty straight forward and practical. Tough to say what is on audiobook.
Good luck.