The Spirit Morph Saga

"The Spirit Morph Saga" is a series of four books, introduced in "Marble Madness". The series is a personal favorite of Connie's, and after she introduces it to Steven, she allows him to borrow her copies so that he can start reading the books as well.

The author is unknown, as the author has not been mentioned by name, nor is a name visible on any of the books.

Story
The book series is about a girl named Lisa, who is unaware of the fact that she is a witch and the capabilities that follow. She has a familiar - a "spirit companion" that everyone in the Spirit Morph Saga universe apparently has - who is a talking falcon named Archimicarus. The plot of the saga, in a nutshell, is that Lisa is going on a quest to find her father, after he is kidnapped by a mysterious unknown one-eyed man.

Cast

 * Lisa - Main Protagonist
 * Archimicarus - Lisa's Familiar
 * Plinkman - Lisa's Father (deceased) 
 * Unknown One-Eyed Man - Main Antagonist

Books

 * 1st - Unfamiliar Familiar
 * 2nd - Welcome to the Wizard Wilds
 * 3rd - Overneath the Underworld
 * 4th - Destiny's End

Episode Appearances

 * "Marble Madness"
 * "Open Book"

Trivia

 * The Spirit Morph Saga bears similarities to many urban fantasy series, but seems especially similar to the series "His Dark Materials". The main character in the series is a girl named Lyra, who has a familiar named Pantalaimon (also an Ancient Greek name), referred to as a Daemon, which everyone in the world also possesses. She, like Lisa, spends much of the series searching for her father, who has also gone missing.
 * That Steven can't seem to grasp the concept of an animal familiar is highly ironic given that his relationship with Lion very much mirrors that of Lisa and Archimicarus - Lion could be seen as his own magical animal familiar.
 * The title is similar to Animorphs.
 * This book also shares the same plot as Ni No Kuni, a 2010 video game about a wizard boy named Oliver. He goes on a quest with his familiars in another world to find his mom's soul, which has been captured by an evil man named Shadar.
 * The episode "Open Book" was based around the book series, and reveals more details about the plot.
 * The last book in the series, Destiny's End, was 917 pages, revealed by Steven when asked by Connie how he felt about the ending in "Open Book"
 * The series ends with Lisa and Archimicarus getting married, after Archimicarus transforms into a human.
 * The final book contains a 50-page long description of their wedding cake, much to Steven's delight and Connie's dismay.
 * It's possible that the "50-page long" statement is an over-exaggeration.
 * While Connie outright disliked the end of the series, Steven secretly liked it. He was afraid to tell her this, however, because of how passionate she was about it. Later on in the episode, he was forced by Cloud Connie to admit that he liked it.
 * Apparently, according to Connie's costume and Steven's drawing, Lisa lost an eye (or got a patch) over the course of the books.
 * The covers of the books share a resemblance with the covers of the book series Fablehaven.