So nerdy guy with little to do so I created a slightly altered version of the original Book of Girls layout to show how Tinkerer could give himself more wiggle room when it comes to adding girls.
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So in the OG Book their was a single extra row on the far right -> of the book that no longer exists. Bringing that back takes it from just 8 girls to 13 girls (1 slot is forfeit currently to blond giantess). However if we centralize the back button to be between Adaobi (above) & Oksana (bellow) then we bump that to 14. Based on what Tinkerer has said in the past these are the girls I expect have the highest chance to crop up. Also there are 2 Temple rooms left & I would appreciate seeing those filled with 2 new girls (currently there are no girls that fit going to the Temple as their arc & I would hate to see them remain empty lol).