Books like The Andalite Chronicles

Okay, first, I feel like I need to preface this review by confessing that if I had read this book for the first time at age thirty-one, I wouldn't be giving it five stars. My rating is entirely colored by my intense nostalgic feelings of love for it. As an adult reading it as a part of an ongoing series, this is a solid book that does some really cool things. But for a kid who'd never read any science-fiction before, this book absolutely GOBSMACKED me. It's the reason I love science fiction.Your average Animorphs book is 150 pages and takes place on Earth, as the kids fight a guerrilla war against the silent Yeerk invasion. This book is 326 pages and the main character is an alien. Almost all the characters are aliens, and it mostly takes place in space, or on alien planets. The main character also happens to be the Andalite Elfangor, the alien who gave the Animorphs their powers back in the very first chapter of the very first book. The frame of the book is that Elfangor is dying, and as he is dying, he sends his thoughts to be recorded, his "hirac delest," or final statement. Elfangor achieved great success and fame as a war-prince, but he carries a great burden for his part in events that happened years before, events that allowed the first Yeerk to obtain an Andalite host body. It is due to Elfangor's actions that Visser Three exists.But this isn't just the story of how Visser Three captured an Andalite body, it's Elfangor's story. Who was this alien who gave five kids the power to morph? Why did he do it, breaking one of his people's highest laws? Where did he come from? What I find so engrossing about this book is the worldbuilding. We've been hearing about all these alien races for twelve books now, hearing about the terrible wars they fight with each other, the places them come from. But here we actually get to see it. We get to see Andalite space battles and Andalite culture. We get to see the Taxxon homeworld, and the difficult choices that war thrusts upon everybody. We meet the creepy, tongue-in-cheek Skrit Na. And this book really doesn't pull any punches. There are some genuinely upsetting and terrifying things that happen. (view spoiler)[Elfangor's fellow aristh (cadet), Arbron, getting stuck as Taxxon and being left behind. The revelations of Alloran's past war crimes towards the Hork-Bajir. The terrifying nature of the Time Matrix (Loren's fast-growing fingernails into claws is a seriously upsetting image). And Elfangor's ultimate choice, to leave behind a safe life with his human family, and his soon to be born son, Tobias, to give the galaxy a chance at peace.Yes, this is where we find out that Tobias's parents are Loren and Elfangor (in human morph). Tobias's life is incredibly sad. Stuck as a nothlit, his mother long dead, his father he thought abandoned him. It would be far too coincidental if Applegate hadn't planned it that way from the beginning. (hide spoiler)]