Pages won't switch string values?

So, I wanted to make a book with pages and the pages are set to number values. I made 2 buttons so that when the right button is clicked the number value will go up and so should the page.

I only get the first page and then the code page seems to stay like that even if the number has gone up or down.

You'll see what I mean down here.

pgs = script.Parent.ForAuthors.Pages
pageTable = {pgs.Page1.Value,pgs.Page2.Value,pgs.Page3.Value}
pagewrite = script.Parent.pageHolder:WaitForChild("Page")
Lb = script.Parent.LeftArrow
Rb = script.Parent.RightArrow
pgNum = 0




    Rb.MouseButton1Click:connect(function()

        print("Page turned")
        pgNum = pgNum + 1 
        pagewrite.Text = pageTable[1]
        print(pgNum)

    end)
    Lb.MouseButton1Click:connect(function()
        print("Page turned back")
        pgNum = pgNum -1 
        print(pgNum)

    end)