The book I am looking for is/was a children’s book that I loved as a child. I was born in 1955 so I am guessing the book was published in the 1940s or 1950s. I checked it out, with the help of my mother, from the Pittsburg, California Public Library. I think I remember that the cover of the book was red and the illustrations were in black and white.
It was about a little Hispanic boy, Mexican, I think, who hated to take a bath. His family and village all must convince him to take a bath for some special celebration. I think the name of the book was the boy’s name, maybe Miguel, The Dirty One.