Reward Box with Ship Blueprints Didn't work

I opened the day 4 login bonus ship blueprint box while in my stronghold with the dispatch menu open. The chat log indicated I acquired the books for the ship blueprints but nothing appeared in my inventory. I cannot find them anywhere else. I don’t think the reward box is working as intended? Or perhaps I missed something?

Can someone help?

EDIT: It appears they go directly into sailing inventory > storage > sailing materials. I just didn’t know where to look. Apologies everyone.