I recommend different books. Teach each other what you learn from the book you're working with. Why double up the work. It's also easier to source books locally rather than having to purchase the same books.

Teach each other, show what you learned from the book that others can take away from the book based on what you learned.

That way too you can see similarity and differences between authors.

In all I say grab a book today. Spend 35 minutes with it (10 minutes the first 4 steps and 20 minutes one activation layer)

Then post what you got from that 30 minutes.

Then you can discuss whether you want to do more activation how much time you're planning to spend with the book.

Since you wanted to help each other with the system I think everyone would benefit from a report after each activation layer.

And different books. There is a reason I recommend different books and I would like to see this project underway before I discuss it.

Alex