Multiple Queries On One Page – Did I Do It Right?

I have a page set up for my writing which you can view here:

https://www.thisisedie.com/fiction/

I’m using pages to do this and so I made a page called “Fiction” and then made pages called “New Stuff”, “Old Stuff”, and “Ruben’s Hollow” which are children of Fiction. I then made pages for the writings and made them children of the 3 topics. I’m using query_posts to list the children of each of the three topics under the proper heading and it works perfectly fine but I’m wondering if I’m using query_posts correctly in this case or if I’m gonna run into trouble later? Code for the fiction page is here:

https://pastebin.com/6pUrLzmL

Hope I explained that well enough. Thanks for your time :o)