The Voyager Company is truly worthy of study if you are at all interested in a vision for hypermedia before the internet.
- Collected media https://the-next.eliterature.org/collections/2
- A catalog introducing this software to a print audience https://archive.org/details/voyager-360-catalog/mode/2upa
The Digital Antiquarian covered Voyager Company on his excellent blog:
https://www.filfre.net/2021/06/bob-stein-and-voyager/
https://www.filfre.net/2021/06/the-best-of-voyager-part-1/