Chuka and Champawat IV....... Baby Book
https://wiki.guildwars2.com/wiki/Chuka_and_Champawat_IV:_A_Nontraditional_Family
And as a suggestion, if you get stuck, best to /wiki (X) and see what the wiki says. Yes I’m aware it’s run by the community, but it’s usually 99% correct.
I’m a Moose, a ginger moose even.
I think I know what the issue is – you need to talk to Cymbel with a Crude Leather Book in your inventory. This crude book you have already crafted several times in the Chupacabra collections and you have the recipe already (Huntsman). She will then give you the Baby Book and unlock the corresponding collection (which, btw, is cute af, you’ll see).