There appears to be an omission from the invocation text and I wonder if this is intentional. It's a bit hyper-specific so I haven't been able to find anything relating to this question.
"With your Book of Shadows in hand, you can cast the chosen spells as rituals. You can't cast the spells except as rituals, unless you've learned them by some other means."
What this omits is the spells that you can eventually add to the Book of Shadows. It does not explicitly state that you are only able to ritual cast a ritual spell that is in the book, it only says this for the chosen spells.
There appears to be an omission from the invocation text and I wonder if this is intentional. It's a bit hyper-specific so I haven't been able to find anything relating to this question.
"With your Book of Shadows in hand, you can cast the chosen spells as rituals. You can't cast the spells except as rituals, unless you've learned them by some other means."
What this omits is the spells that you can eventually add to the Book of Shadows. It does not explicitly state that you are only able to ritual cast a ritual spell that is in the book, it only says this for the chosen spells.
So there seems to be a bit of an omission in the text of your post :p What exactly is your question?
I apparently created two threads and I have no idea how that happened. I did fix this post though 😂