* EvenBetterSequel: according to a [[http://gallaghergirls.wikia.com/wiki/Gallagher_Girls_Wiki poll on the Gallagher Girl wiki]] (taken when there were only five books), the ''fifth'' book is by far the voters' favorite book. The second one is the runner-up, followed by the fourth and third. The first book is the voters' ''least'' favorite.
* LesYay: Cammie ''really'' likes to point out how hot her roommates are.
-->"She (Macey) was running toward me. So strong. So fast. So beautiful."
* NightmareFuel: [[spoiler: Cammie gets brainwashed and forgets an entire summer. Later, the same person hypnotises her and orders her to kill herself. If she hadn't been stopped, she would have done it.]]
** [[spoiler: In the sixth book: the song that Zach remembers his mother singing to him when he was a child. Hearing Catherine sing the song herself after she's captured is rather chilling.]]
-->[[spoiler:''Above the plains up on the hill there stood a castle bold. A gleaming palace made of white, a pillar to behold. The horsemen lived in service to the castle and the crown. But the knights rose up and killed the kings. And it all burned down.'']]
** The Circle of Cavan's [[spoiler: master plan: Liz's hypothetical plan to start World War Three. Poor Liz is horrified when she finds out that they're actually using it.]]
-->Cam: "Do you hear the music, Mom?"
-->Mom, holding back tears: "No."
-->Cam: "''Me neither.''"