The stories follow two lovable hippos, George and Martha, presented as short, funny vignettes about friendship, practical jokes, and everyday misadventures, accompanied by humorous drawings.
Collector and reprint editions include introductions and appreciations by noted authors and illustrators, an afterword, full‑color illustrations, and compiled volumes that gather many of the short George and Martha episodes into a single book.
Children's titles are listed for ages 4–7 years, while adult-focused books are listed as 22 Years and Up.
Both hardcover and paperback formats appear; listed dimensions range roughly from 7.8 × 7.9 × 0.2 inches up to 9.4 × 8.6 × 1.3 inches.
The stories are short, humorous, warm vignettes with illustrations that elicit empathy, delight, and laughter.
The history and Cold War titles portray Marshall as a multifaceted leader—soldier, statesman, and peacemaker—and document his service in roles such as Army Chief of Staff, special presidential envoy to China, Secretary of State, and Secretary of Defense.