Pretty Guardian Sailor Moon Series (books 1-4) by Nako Takeuchi
Title: Pretty Guardians Sailor Moon by Nako Takeuchi
Premise of Series: Usagi is an 8th grade student and is fourteen years old. She is loyal, clumsy, a terrible student, and crybaby. She discovers, after meeting Luna the cat, that she is a Sailor Scout and is tasked with saving the universe. Her journey begins when she saves her best friend and accepts her new responsibility.
The second book in the series: Ami is a genius who has transferred to the same school Usagi attends. Usagi befriends her hoping that her grades will improve. Both girls are caught by a monster and it is at this time that it is revealed that Ami is the second Sailor Scout. Ami is Sailor Mercury and is happy because it means she has a finally made a friend and has a purpose outside of studying.
Third book introduces Rei. Rei is a miko and has psychic abilities that allow her to sense the presence of evil. Her path crosses with both Ami and Usagi when it is reported that a "Demon Bus" is picking up passenger but failing to get them to their intended destination. While fighting this evil, it is revealed that Rei is Sailor Mars.
The fourth book introduces the reader to Makoto, a girl with a tough exterior that hides her gooey inside, that will become the fourth Sailor Scout Sailor Jupiter.
The purpose of the Sailor Scouts is to defend Earth against evil not of this world, find the Legendary Silver Crystal, and protect the princess once she's found. Along the way, the girls relationship and fighting skills deepens and Usagi begins to crush on Tuxedo Mask. Tuxedo Mask has saved her numerous times but it is unclear if he's friend or foe at the beginning of the series. Once his truth is uncovered the plot lines get better to the point that you can't wait to get to the next one.
