The excitement and stir caused by the summoning ceremonies of his four friends excited Zach to the point where he was about to put in some work so that he could also summon his next familiar. It made him temporarily forget that he had just summoned his third familiar. He would have to work like a pack of dogs and a maniac to summon his fourth before the year was over.
If he hadn't had anything else to do, he might just have done it simply because he wanted to. Unfortunately, he wasn't that free. He had his studies. But those he could ignore. What he couldn't ignore, however, was the Underworld's looming threat.
With less than a month left on the deadline, they couldn't be too cautious. They couldn't prepare too much. They couldn't be too ready.