Access ERD Model

Hey! I need to finish a database assignment but I'm stuck with the ERD. I have the structure already and you can see it below: https://imgur.com/aCxxMtj My lecturer asked me to add 3 more intersect tables. One between tblPurchase and tblBook, another one between tblReplenishment and tblBook and between tblOrder and tblBook. I tried to put them, but it messes up the whole ERD. Shall I add something or keep it as it is?