What you’ve written here makes me think you want to finish reading one entire book per week.
But the rest of your post makes it sound like you want to make sure that you read part of one book each week.

If you’re not in a hurry to finish reading the book, then 28 pages a week and using the numbers I posted above should be fine.

Once you’ve created the goal, you can edit it using the “Road dial” underneath the graph.
Set the goal total to 1024 (the total number of pages.)
Set the goal date to 4 weeks from now.
Click ‘Dial-It-In’ (twice)

It will work out how many pages you need to read a week (193.5) and adjust the road accordingly.

Think of an odometer like a car milage thing: it starts out at some number when you buy it (zero if new) and then if you drive 10 miles the number goes up by ten, but the total doesn’t have to be a nice multiple of ten.

With an odometer goal you put in what page you are currently on and the computer does the math for you - that is what they are good for.