Until recently, I published my novels only on Amazon, but now have been publishing them on Bookapy as well. However, when I published on Amazon I enrolled each novel in the Kindle Unlimited program which requires the novel to be exclusive to Amazon for a 90-day period. For each novel, as the 90-day period expires I will be publishing the novel on Bookapy.
"High School Massacre" was released from the exclusive agreement with Amazon so I published it on Bookapy. The cover looks like it's a horror book, but it's not. And the title sounds like it's all about high school shootings, but it's not. It's a thriller/mystery and the high school shooting simply sets the story in motion and is the mystery that needs to be solved. The shooting itself is only the first chapter.
"High School Massacre" is the 2nd novel in the Lincoln Steele series, but all the books in the series are standalone, like James Bond or Jack Reacher novels. There may be some common characters across the novels (like "M" in James Bond), but they are not dependent on each other. I believe the only character other than Lincoln Steele carried over to this novel from the first one is Mr. Cian. He heads up a CIA-like organization that is so secretive it's the only government agency without initials.
"High School Massacre" has non-consensual sex. The purpose of it is to show the evilness of characters so that you root for them to get what they deserve, which is what Lincoln Steele does. He hands out his own form of justice (hence the name of the 1st novel in the series - "Steele Justice").
Like other SOL authors I know, we're putting our novels on Bookapy to support Lazeez (the StoriesOnline owner/webmaster). And like others, I use a different author name for my novels than my stories posted on SOL. On SOL I'm Switch Blayde, but on Bookapy and Amazon I'm S.W. Blayde.