The Templar Chronicles Series by Jeff Gunhus

Orphan Jack Templar has no memory of his parents and only the smallest details from his Aunt Sophie about how they died. The day before Jack's fourteenth birthday, things start to change for him. At first it's great: A sudden new strength helps him defend his nose-picking friend "T-Rex" from the school bully, and even his crush, Cindy Adams, takes notice. But then a mysterious girl named Eva arrives and tells him two facts that will change his life forever... moreOrphan Jack Templar has no memory of his parents and only the smallest details from his Aunt Sophie about how they died. The day before Jack's fourteenth birthday, things start to change for him. At first it's great: A sudden new strength helps him defend his nose-picking friend "T-Rex" from the school bully, and even his crush, Cindy Adams, takes notice. But then a mysterious girl named Eva arrives and tells him two facts that will change his life forever. First, that he's the descendent of a long line of monster hunters and he's destined to be in the family business. Second, that there's a truce between man and monster that children are off-limits...until their fourteenth birthday! Jack has only one day before hundreds of monsters will descend on his little town of Sunnyvale and try to kill him. As if that weren't enough, things get even more complicated when Jack discovers that the Lord of the Creach (as the monsters are collectively known) holds a personal grudge against him and will do anything to see that Jack has a slow and painful death. To stay alive and save his friends, Jack will have to battle werewolves, vampires, harpies, trolls, zombies and more. But perhaps the most dangerous thing he must face is the truth about his past. Why do the other hunters call him the last Templar? Why do they whisper that he may be the "One?" Why do the monsters want him dead so badly? Even as these questions plague him, he quickly discovers survival is his new full-time job and that in the world of monster hunters, nothing is really what it seems. less

After barely surviving the onslaught of monsters that tried to kill him the day before his fourteenth birthday, Jack Templar leaves his hometown on a quest to rescue his father and discover the truth about his past. Joined by his friends Will and T-Rex, and led by Eva, the mysterious one-handed monster hunter, Jack sets out for the Monster Hunter Academy where he hopes to find answers to his questions... moreAfter barely surviving the onslaught of monsters that tried to kill him the day before his fourteenth birthday, Jack Templar leaves his hometown on a quest to rescue his father and discover the truth about his past. Joined by his friends Will and T-Rex, and led by Eva, the mysterious one-handed monster hunter, Jack sets out for the Monster Hunter Academy where he hopes to find answers to his questions. Little does he suspect that the Academy is filled with dangers of its own, many of them more terrifying than anything he’s faced so far. less

With two of the Jerusalem Stones in hand, Jack and his friends must race the clock to find the remaining Stones as Ren Lucre's Creach forces gather strength. With two of their group now with Creach blood flowing in their veins, the team will be tested as never before. They must unite together if they have any hope of surviving their journey to the Underworld and their battle with the vicious Lord of the Demons. The fate of the entire world hangs in the balance.

Jack Templar faces his greatest challenge yet...In the sixth and last book of the Jack Templar series, Jack and his friends race to stop Ren Lucre before he launches this Creach army against humankind. But the Lord of the Lesser Creach and the Lord of the Zombies hold the last two Jerusalem Stones Jack needs to have any chance of success. To make matters worse, the Oracle predicts that one of their group will die in the upcoming fight, and Jack discovers betrayal among those he trusts most... moreJack Templar faces his greatest challenge yet...In the sixth and last book of the Jack Templar series, Jack and his friends race to stop Ren Lucre before he launches this Creach army against humankind. But the Lord of the Lesser Creach and the Lord of the Zombies hold the last two Jerusalem Stones Jack needs to have any chance of success. To make matters worse, the Oracle predicts that one of their group will die in the upcoming fight, and Jack discovers betrayal among those he trusts most. Even so, Jack must find the courage to lead his friends into battle. Either they collect the Stones in time to defeat Ren Lucre or die trying. It’s "Do your duty, come what may" no matter the cost. The fate of the world hangs in the balance. less