Looking for a Good Title on British Campaign in East Africa - 1940/1

Are there any good titles on the British campaign in East Africa in 1940-41?

Please advise.

I've got Haile Salassie's War: The Ethiopian-Italian Campaign, 1935-1941 by Anthony Mockler. The book details page says "1935-1940", but the book itself (which I have) is "1935-1941". It's pretty good. I may have others, I'll try to putter around and find them.

"Unofficial History" by William Slim tells of his action at Gallabat. For a Field Marshal, he's a good writer.

There's An Improvised War: The Ethiopian Campaign 1940-1941 . There's also several official histories on it - British, Indian, and South African. The Indian one has recently been reprinted and is fairly inexpensive.

Neil Orpen- see touchstones