Monster Problems (Time Villains, Bk. 2)

With Blackbeard banished from their present time, life has gone somewhat back to normal for Javi, his sister Brady, and his best friend Wiki. And Javi can now focus on his favorite thing in the world: crafting extreme sandwiches. Except their beloved Principal Gale has to make an unexpected trip back to Oz, leaving the excessively strict and downright terrifying Ms. Vlad in charge.

With the school all kinds of doom and gloom the trio is desperate for some change. Luckily that arrives in the form of their new Vice Principal, Mr. Dragon. Mr. D is immediately adored by the students, especially Brady, and Javi's glad he wasn't forced to summon any historical or fictional folks from his magical table to get the school back on track.

Except something seems a little off about Mr. Dragon, and soon it's clear he isn't who he says he is. With Brady under his spell he's able to summon his monster crew to take over the town, and eventually the world. Javi's going to have to get his own team if he's going to stop their evil vice principal before it's too late.