Hi Johnny,
Adding to what Robert and Barb have already said, here's a quick step-by-step guide for linking text boxes across pages in InDesign:
Create a text frame: I typically have 1 Text Frame per page - and then you style your text into the format for the page - whether that Text Frame is 1 column, 2, 3 etc is up to you.
Link the frames: Click on the small square at the bottom-right corner of the first text frame (called the "out port"). Your cursor will change to a loaded text cursor. Then click on the next frame where you want the text to flow. Repeat this process for all subsequent frames.
You could put the Text Frame on the Parent Page and use the Reflow Story in the preferences
More here https://helpx.adobe.com/ie/indesign/using/threading-text.html
Remember best practice - 1 text frame per page
Autoflowing text: If you're importing text from an external document (e.g., Word), use File > Place to load the text. Hold the Shift key while clicking into the first frame, and InDesign will automatically create and link additional pages and frames as needed. Click near your margin in the top left and it will create a text frame on all pages in the same position sized to the margins.
Tips for managing large text-heavy projects: