There are some new Alter Ride Books that ya'll might miss

Getting Spider, Machine Uri no Shoujo, and Akan Zukin Alter Ride Books, these were used by Calibur as means to access Avalon. Getting Spider ARB is used to summon Spider Megid, a Megid that appear exclusively in Kamen Rider Buster manga.

Don't forget these three Alter Ride Books too

Kabekara Gargoyle, Drill Mandrill, Usotsuki Wolf Alter Ride Books. These Wonder Ride Books are also used by Calibur to access Avalon, though only Mandrill and Wolf ARBs are seen, the fandom says theres other two Alter Ride Books so i guess Gargoyle ARB was included too.