In patchouli.cfg, you can set a button to be the "Inventory Button Book" and by clicking on that button in your inventory, it opens the book. It would nice to have a keybind for this, if said option is set for the player.

This issue is stale because it has been open for a while with no activity. Please bump if this is still an issue, or this ticket will be closed soon.

I haven't used it in a while, but I still don't think this feature exists? It would be nice to have!