I genuinely believe they've been cancelled now. Lindsay confirmed she was hired to write 1 production season, AKA 26 half-hour episodes, meaning 52 episodes of the show. But she also confirmed not all of those episodes were produced. Owen confirming most of the crew were gone by August and production wrapped fully in December lines up, timeline-wise. And now Owen is pitching new projects and offering crew references on Twitter. I think Book 5 might have been written but will never be produced. At this point restarting production would be illogical expensive.
When he made us believed IT ended at book 3, he was actually refering to book 4, it is by far SUPER CONFIRMED that the show ended here for now, youre being delusional