This was a story first published in 1958 and was recommended to me by a friend and while it wasn't the most original or entertaining story, it was one that was engrossing enough and made for a worthy read, although it's not one I would have picked up had it not been recommended. It is commendable that the author chose to set this in a different country than the USA where lamentably, far too many authors seem to think is the only place any story can be set!
It takes place in Paris, France, and is of this single-mom family which is on its uppers, as they say, and is homeless. The family is befriended by a somewhat cantankerous homeless guy who knows his way around the system, and though he's initially resentful of the family invading his turf, he starts to take them under his wing and is instrumental in helping them get back on their feet again.
So, it's a bit trite and simplistic, and somewhat overly optimistic, but it does tell a short and meaningful tale that can be used to educate young children about how bad luck can strike at any time through no fault of the family concerned, and that homelessness does not involve only those 'strange adults' who live on the streets in the seedier parts of town.
I commend this as a worthy read for young children.