Leon Comber was a Special Branch operative in British Malaya. He was also married to the famous writer Han Su Yin.
I read this book in 2009.
In this slim 134-page book he narrates the day of infamy in Malaysia. It is a good survey though he avoids the issue of who started the riots.
For an interesting observation on these, readers may wish to read pages 27 to 31 of My story: Justice in the Wilderness by Tommy Thomas, ex AG Malaysia. (2021 ed).