Yes, in some fanfictions, Naruto is depicted as a ladies man. Writers often like to explore different aspects of a character's personality, and making Naruto into a ladies man can add an interesting dynamic to the story, especially in romantic or comedic storylines.
It can be considered a true story. The book attempts to present an accurate account of the events and characters it portrays, with research and documentation backing it up.
It could be about Naruto having a charm or allure towards the female characters in the Naruto universe. Maybe it shows Naruto in various romantic or flirtatious situations with the ladies.
His heroic deeds. In fanfiction, Naruto's status as a hero who saved the village makes him attractive to women. They see him as strong and brave, which are qualities that many female characters might find appealing.
Since I haven't read the 'ladies man novel', I don't know exactly. But it's likely that there is a central male character who is the 'ladies man' himself.
I'm not really familiar with a specific 'Ghost of a Texas Ladies Man Story'. It could be a local legend where a charming Texas man passed away and his spirit is said to still roam, perhaps still flirting with the ladies in a spectral way.
It's hard to say it's a mainstream popular genre. While there are likely many fanfictions out there exploring different aspects of Harry Potter's character, not all of them focus on him being a ladies' man. However, for some fans who are interested in exploring the romantic side of the characters or re - imagining their relationships, this type of fanfiction might be appealing.