Elfangor-Sirinial-Shamtul is an Andalite war prince--the one who gave the Animorphs the power to morph. "The Andalite Chronicles" is the story of how this warrior-cadet ended up on planet Earth Ages 9-12. Pub: 12/97.

We found out who Visser Four is. And he has found the Time Matrix, the machine Elfangor had hidden in the abandoned construction site. The same place we met him on a night none of us will ever forget. Especially me. Now Visser Four has the Matrix, and he plans to use it to become Visser One.But Jake, Rachel, Cassie, Marco, Ax and I can't let that happen. We can't let him alter time so that the Yeerks will win the invasion. So we're prepared to make the ultimate sacrifice. Eventually, one of us will lose this fight...

Elfangor travels to the Taxxon home world and encounters Sub-Visser Seven.

Her human name is Eva. There was a time when she had a loving husband and a son, Marco. When she had a wonderful career. But that was before she was infested by Edriss 562. Before the invasion of Earth. Now, Edriss 562 lives in Eva's head and controls her every movement. And through Eva, Edriss has become the highest-ranking general in the Yeerk empire, surpassing even her arch rival, Visser Three. She is Visser One.But it has become known that Visser One's tactics for attaining her current position were less than acceptable -- even to the Yeerks. Now she's on trial for treason. If she's found innocent she'll continue to rule. But if she's found guilty, she'll lose her life -- and possibly the life of her host, Eva. Which will mean that Marco will never, ever see his mother again...

Tobias has gotten used to his new life. He's a red-tailed hawk with the mind of a kid. It was difficult when he first became trapped in his morph, but he's started to come to terms with things. After all, how many kids actually get the chance to fly?But now Tobias is about to make a very difficult choice: a choice that the other Animorphs know nothing about. And it could mean the difference between living the rest of his life as a hawk...and being human.

He is called the Ellimist. A being with the ability to alter space and time. A being with a power that will never be fully understood. He is the reason Elfangor came to Earth. He is the reason the Earth now has a fighting chance. And though his actions never seem quite right or wrong, you can be certain they are never, ever what anyone expects. This is the beginning and the middle of the story. A story that needs to be told in order to understand what might happen to the future. The future of the Animorphs. The future of humanity. The future of Earth. He is called the Ellimist. And this is his story...