There's no way to be certain without more information about this novel. But perhaps it features a detective and a journalist. The detective is dealing with a difficult case, which is one 'whammy', and the journalist is trying to expose a big scandal at the same time, which is the second 'whammy'. And their paths cross in the story, making them the main characters.
Since I don't know the specific 'double whammy novel', I can't tell you the main characters. It could be a story about ordinary people like a single mother and her son, who are facing two difficult situations together.
I'm not sure specifically as there could be many novels with that name or concept. It might be about two major problems or events that hit the characters in the story. For example, it could be about a character facing both financial ruin and a relationship breakdown simultaneously.
There are a few key characters. First, there's the wife. She's in a situation where she wants out of her marriage in a rather unethical way. Then there's her lover. He's the one who gets involved in her plan to get the double indemnity from her husband's insurance. And of course, the husband, who is the victim of their planned murder.
As we don't know which 'double star novel' is being talked about, it's impossible to determine the main characters. There could be two protagonists named after the double star concept, or it could be a group of characters with one pair being the central focus related to the double star idea.
I don't know for sure as I haven't read it. But it's likely that the main character is the secretary herself. There might also be her boss, colleagues, and maybe some people from her personal life like her family or friends.
I'm not sure specifically, but they could be two pairs of lovers.
Well, obviously, the billionaire husband is one of the main characters. And his wife, who is likely to be the one to discover his double life. There might also be business associates or friends who are either in on his secrets or are also in the dark and get caught up in the drama when the truth starts to come out.
The heiress is surely one of the main characters. In addition, there could be business partners in her public life as a billionaire heiress. In her other life, there may be people she meets in a more ordinary setting, such as coworkers in a job she takes on secretly or neighbors in a different neighborhood. These different people in her two lives would help shape her experiences and the story as a whole.
I'm afraid I don't know the main characters as I'm not familiar with 'a double death on the black isle a novel'. They could be locals from the Black Isle, or perhaps outsiders who end up being involved in the double death situation.
I don't know for sure. But surely there's the billionaire heiress herself. There might also be her family members like her parents who could be tycoons and have a big influence on her public life. And perhaps there's a love interest in either her public or private life.
There's no way to determine the main characters in the 'double crossed free story' without more details. However, it could be that there's a protagonist who is the victim of the double - cross. There might also be an antagonist, the one who does the double - crossing. And perhaps there are other supporting characters like friends or family members of the protagonist who play important roles in how the protagonist deals with the situation.