Unfortunately, without more research or prior knowledge, I can't tell you the author of this 'amor de mae novel'. It could be an independent author or from a small - scale publisher. There are so many works out there, and this title doesn't immediately ring a bell in terms of a well - known author.
I'm not sure specifically as there could be many novels with this name. It might be about a mother's love. Maybe it tells the story of a mother's selfless love for her children, her sacrifices and the strong bond between them.
The novels may also have a strong sense of atmosphere. Since they are in the realm of romance, settings could be dreamy, like old castles or beautiful gardens. The descriptions of these settings, combined with the poetic language, create a world that is both alluring and immersive for the readers.
In the 'pan de sal saves the day story', it could be that a character was in a tight spot, perhaps lost in a forest or in a strange place. They happened upon a store or a kind person who gave them pan de sal. This simple bread gave them the strength to keep going, whether it was to find their way back home or to complete an important task. It became the key element that turned a bad situation into a survivable or even successful one.
'Wuthering Heights' is also a great choice. The intense and often turbulent love between Heathcliff and Catherine is expressed in a very evocative and almost poetic way. The moors and the wild setting add to the overall atmosphere of a passionate, if somewhat dark, love story.
I'm not sure of the specific details of this story, but generally it might be that pan de sal was used to feed a large group of people who were in need. For example, in a war - torn area, pan de sal was distributed to the starving civilians, giving them hope and energy to carry on.