Robert Munsch's weirdly tormented/wholesome life is crying out for a more substantive biography. Until the day comes that we get a more definitive book/doc about Munsch (perhaps after his death?), this portrait by Frank Edwards might be the best we will get.
There is information in here I wasn't able to find online, and there are a few photos of young Munsch (as a kid and as an adult pre storybook fame) that I have never seen, despite my efforts to track them down. Even still it's a pretty basic biography!