When I select the Book of Ancient Secrest as one of my Eldrich Invoccations (level 5 warlock), I have the option to pick 3 rituals intstead of just 2. In addition, the third ritual has more options and, if a spell is selected, will create a new drop down menu allowing me to select a 4th spell. If a 4th spell is selected, a fifth dropdown box will appear. This behavior loops.
When I select the Book of Ancient Secrest as one of my Eldrich Invoccations (level 5 warlock), I have the option to pick 3 rituals intstead of just 2. In addition, the third ritual has more options and, if a spell is selected, will create a new drop down menu allowing me to select a 4th spell. If a 4th spell is selected, a fifth dropdown box will appear. This behavior loops.
You can now inscribe magical rituals in your Book of Shadows. Choose two 1st-level spells that have the ritual tag from any class’s spell list (the two needn’t be from the same list). The spells appear in the book and don’t count against the number of spells you know. 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. You can also cast a warlock spell you know as a ritual if it has the ritual tag.
On your adventures, you can add other ritual spells to your Book of Shadows. When you find such a spell, you can add it to the book if the spell’s level is equal to or less than half your warlock level (rounded up) and if you can spare the time to transcribe the spell. For each level of the spell, the transcription process takes 2 hours and costs 50 gp for the rare inks needed to inscribe it. "
That is how it is supposed to work. From the warlock class page:
"
Book of Ancient Secrets
Prerequisite: Pact of the Tome feature
You can now inscribe magical rituals in your Book of Shadows. Choose two 1st-level spells that have the ritual tag from any class’s spell list (the two needn’t be from the same list). The spells appear in the book and don’t count against the number of spells you know. 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. You can also cast a warlock spell you know as a ritual if it has the ritual tag.
On your adventures, you can add other ritual spells to your Book of Shadows. When you find such a spell, you can add it to the book if the spell’s level is equal to or less than half your warlock level (rounded up) and if you can spare the time to transcribe the spell. For each level of the spell, the transcription process takes 2 hours and costs 50 gp for the rare inks needed to inscribe it.
"
Check Licenses and Resync Entitlements: < https://www.dndbeyond.com/account/licenses >
Running the Game by Matt Colville; Introduction: < https://www.youtube.com/watch?v=e-YZvLUXcR8 >
D&D with High School Students by Bill Allen; Season 1 Episode 1: < https://www.youtube.com/watch?v=52NJTUDokyk&t >
I'm a dumb dumb. Thank you!