less than others from the same collection

My kids got the other 3 books (learning, development and print) that were very well done. So I bought one for my nephew who is ce2 and problems carefully and write speed.
I find it too basic textbook, much less effective than the other 3.
probably should be a child / teenager who has not the good basics of writing (positioning of the fingers, basic letter formation), but not to a child who wishes to train in speed.