There is a multiversal store called the Multi-Mart. They have charted many, many alternate universes. Some are open for trade while others are not.
Annabelle’s world is Sector 1692. It’s off limits to regular contact and trade due to the fact that this universe hasn’t discovered the true existence of the multiverse.
Nevertheless, there are doorways to Sector 1692 and it is featured in the Multi-Mart novel.
The Earth of this universe is the setting of the Annabelle and Roland series.