The four series follow Grace Harlowe and her friends through high school, college, abroad during World War I, and on adventures around America. In The High School Girls Series, Grace attends Oakdale High School with friends Anne Pierson, Nora O'Malley, and Jessica Bright. The four promote fair play and virtue while winning over troubled girls like Miriam Nesbit and Eleanor Savell, playing basketball, and founding sorority Phi Sigma Tau. The group becomes friends with boys in their acquaintance: David Nesbit, Tom Gray, Hippy Wingate, and Reddy Brooks, forming "The Eight Originals...

The four series follow Grace Harlowe and her friends through high school, college, abroad during World War I, and on adventures around America. The College Girls Series sees the friends part ways: Grace, Anne, and Miriam depart for Overton College, while Jessica and Nora attend a conservatory. The Eight Originals gather on holidays, but the seven College books focus on the three at Overton, along with new friends like J. Elfreda Briggs. They form Semper Fidelis, a society devoted to aiding less fortunate students at Overton. Following graduation, Grace rebuffs offers of marriage for "what she had firmly believed to be her destined work," managing Harlowe House at Overton.

“When Captain Carey went on his long journey into the unknown and uncharted land, the rest of the Careys tried in vain for a few months to be still a family, and did not succeed at all. They clung as closely to one another as ever they could, but there was always a gap in the circle where father had been….. The only thing to do was to remember father's pride and justify it, to recall his care for mother and take his place so far as might be; the only thing for all, as the months went on, was to be what mother called the three Bs -- brave, bright, and busy...

"Foster, Lieutenant, R. I. P.," blared the voice horn, and five minutes later Rip Foster was off into space on an assignment more exciting than any he had ever imagined. He could hardly believe his ears. Could a green young Planeteer, just through his training, possibly carry out orders like these? Sunny space, what a trick it would be! From the moment Rip boards the space ship Scorpius there is a thrill a minute. He and his nine daring Planeteers must cope with the merciless hazing of the spacemen commanding the ship, and they must outwit the desperate Connies, who threaten to plunge all of space into war...

Seventh entry in the Rick Brant Science Mystery Adventure series has Rick and buddy Scott using infrared technology on the trail of smuggling no-goodniks in the vicinity of Spindrift Island, Rick's home and location of his dad's laboratory, off the New Jersey & New York coast.