THREE DAYS.
Three days had passed since Zoe was sucked in by the book.
That was also how long Isaak had stayed in his office which had now become his new bedroom. Not that he had a decent sleep for the past three days. How could he do that when he didn't know when Zoe might need him?
["Zoe has weak Mana, and the book needs a lot of Mana in order to stay activated. Once Zoe runs out of Mana to fuel the spell, the book will look for a new source of Mana. You have to be there when that happens, Isaak. That's your only chance to follow your wife inside the book."]
That was what Lady Tabitha told him the last time they talked.
Hence, he was stuck in his office. Thankfully, his office had an adjacent bathroom and toilet. It was built that way since he was a workaholic who hated wasting time. Thus, it wasn't difficult for him to lock himself up in his office.
His thoughts got interrupted when he heard a soft knock on the door.