When loading into a world, the log complains about certain tags being undefined. All tags it complains about are defined via the gbook:xml/standard.xml template library:

[01:35:26] [Render thread/WARN] [gbook/]: Unrecognized tag: page_title
[01:35:26] [Render thread/WARN] [gbook/]: Unrecognized tag: divider
[01:35:26] [Render thread/WARN] [gbook/]: Unrecognized tag: big_recipe

The page_title element for example therefore doesn't work in-game, leading to all pages in the example book missing titles.

Forge: 1.19.3-44.1.0
Guidebook: Guidebook-1.19.3-3.7.1

Oops didn't notice that. Looking into it.

v3.7.2 should fix this.

Yup, works as expected now