Ref. [1] proposed the booklet wormhole as the holographic dual of the GHZ state. The geometry is not a manifold because multiple spacetime boundaries meet at a multi-way junction. This paper extends the investigation into this geometry, particularly focusing on the junction conditions for matter fields. First, we show that the multi-way junction in our construction is topological, such that no single observer will perceive the junction, and the spacetime they experience returns to a smooth manifold. Second, the symmetry of the GHZ state requires unprecedented quantum non-local junction conditions at the multi-way interface: observers entering from different horizons will perceive different states inside the wormhole, where the junction conditions appear as constraints on the observables of different sets of observers. We finally discuss how to render booklet wormholes traversable via boundary deformations. A localized wave packet injected from one page generally evolves into a non-local mixed state on each remaining page, with the information encoded in the entanglement between different pages.