I've actually had a few people ask about this.

'Inter-Universal Protectors' books are the main novels for this story world. Those in 'Underworld Adventures' and 'The Unlikely Adventures of Amneris Topanga' are short stories that take place before, between and after the main series. You don't need them for the main series to make sense but it will help later down the line (I have plans mwahahahahaha)!

As for what order to read all of them in if you're interested in that, there's a 'timeline' page on my website (link below). The timeline will be updated as more books are released. As the short stories aren't coming out in chronological order, instead the order they're written, I hope this helps!

Alternatively, you can have a look at the 'Series Guide' page which, while similar, will also contain links to each of the stories (link below). As more books, series and works come out, you may find the 'Series Guide' more useful.

Don't worry, the main novels WILL come out in the correct order. I'm not that evil!

https://www.jesslizcross.com/timeline

https://www.jesslizcross.com/interuni...

Special shoutout to all of you checking out my books, thank you so much! It means a lot to me as an indie author and I'm very grateful for the support. :D