3.97 avg rating — 1,279,691 ratings

"Meg Murray, one of L'Engles main characters, is 12 or 13;
Charles Wallace, Meg's younger brother, is 5
Calvin O'Keefe is 15 or 16"

3.99 avg rating — 131,919 ratings

"Meg Murray is 14"

3.95 avg rating — 50,121 ratings

"Sandy and Denny's are teenagers. Meg is in college, not yet married to Calvin."

4.07 avg rating — 111,482 ratings

"Charles Wallace is a teenager;
Meg is married to Calvin"

3.88 avg rating — 10,541 ratings

"Vicky Austin, one of L'Engles main characters in a series, is a pre teen"

3.78 avg rating — 23,788 ratings

"Polly, Meg's daughter, is a teenager, who befriends Zachary Smith, who is also a teenager, so clearly the Austin series is set in the middle of the Kairos series..."

3.81 avg rating — 5,980 ratings

"Vicky Austin is 14, Zachary Smith (never a main character but always popping up in other places) is 16"

3.85 avg rating — 10,305 ratings

"Adam works for Meg's husband, Calvin O'Keefe"

3.77 avg rating — 6,423 ratings

"Austin family is now in NYC. Features Canon Tallis and refers to the events that take place in "The Arm of the Starfish"."