Mahou Shoujo Lyrical Nanoha StrikerS THE COMICS  

Magical Girl Lyrical Nanoha StrikerS THE COMICS, Nanoha StrikerS: A's to StrikerS, 魔法少女リリカルなのはStrikerS THE COMICS

The first three chapters in the series, As and StrikerS, describe the main events that took place between their conclusion and beginning. Subsequent chapters 4-12 offer side stories about the characters. Chapters 13 and 14 detail additional occurrences following the end of StrikerS. Chapter 15 is a special feature from Megami September 2009, which also includes events that happened after StrikerS ended.