The strip focuses on the adventures of a creative little boy, Liō, who lives with his father (unnamed in the strip) and various monsters, animals, aliens, lab creations, and other creatures. Liō’s mother is deceased.[1] It is currently unknown how she died. The setting of the story varies from Liō’s house to his school and the general outside world. The time period appears to be contemporary, except for an episode set in the year 2101, when Liō is in his nineties but still very much capable of mischief.

The story is told visually, with little or no dialogue. Gags frequently involve the supernatural, alien invasion or mass destruction of many sorts, creating a surreal, disturbing atmosphere. Some of the strip’s recurring themes involve Liō getting even with grade-school bullies, helping animals (most of which are non-anthropomorphic but display obvious intelligence) defend themselves against humans or their predators, and performing mad scientist style experiments. He is often seen using robots that he constructs himself for causing mischief. Another recurring gag in the strip is parody of other famous comic strips, including Cathy, For Better or For Worse, Garfield, Zits, Calvin and Hobbes, Blondie, Peanuts, Pearls Before Swine, The Family Circus and Berkeley Breathed‘s strips.

In addition to Liō, the strip only has one other major character, Liō’s unnamed father. He is frequently shown to be the subject of Liō’s pranks, and sometimes he has to get his son out of difficult situations. When he watched a news report of an alien invasion, he gave Liō a spanking for apparently having piloted the alien ship and parking it in the backyard (dated at 2007/02/09). On the other hand, one day when the boy came home from school dejected because a drawing he created had horrified the faculty, Dad proudly hung up the piece of art on the refrigerator, giving his son much-needed comfort and joy (dated 2009/03/15). Quite often, father and son prove that they really love each other, no matter what.[1]

Liō has at least five companion animals:

Garfield, también llamado en la serie el Garfo, debutó el 19 de junio de 1978, considerado como el cumpleaños de Garfield (las caricaturas del 19 de junio siempre muestran a Garfield celebrando su cumpleaños). La historieta se burla de dueños de mascotas y de su relación con los animales domésticos, retratando a la mascota como el verdadero amo de la casa. Garfield también apela a su manera a problemas muy humanos, como las dietas, el odio a los lunes, la apatía, el fastidio, en contadas ocasiones se le atribuyo enemistar a los perros y gatos, el maltrato permanente a los ancianos, etc.

A través del desarrollo de la caricatura, la conducta de Garfield se vuelve más humana y menos gatuna. Su apariencia física también ha evolucionado, pues en sus inicios era un gran gato gordo de mandíbulas flojas y pequeños ojos redondos. Rápidamente empequeñeció, sus ojos se agrandaron y se volvió mucho más sonriente. Hacia 1983 su apariencia familiar (con ojos ovalados) había tomado forma. También empezó a caminar a dos patas, y el estilo de las caricaturas cambió de focalizarse en las debilidades de los gatos a dar énfasis a las situaciones cómicas (como la forma que Garfield se burla constantemente de la mala suerte de Jon con las mujeres).

Las tiras cómicas de los periódicos de los lunes a sábados aparecieron totalmente en color desde el 7 de junio de 1999.

In 1988, Mark Tatulli drew his first published newspaper comic strip, for the Burlington County Times in New Jersey. His next strip, Bent Halos, a comic about a couple of rambunctious angels, was nationally syndicated. Mark eventually put the strip into hiatus to pursue other strip concepts with broader appeal, and to this day he still receives fan mail from Bent Halos readers.

In July 1997, Heart of the City first found her way onto Mark’s drawing board, and she hasn’t left since. Heart quickly caught the eyes of senior editors at Universal Uclick. The strip debuted in newspapers in November 1998 and has garnered rave reviews from fans the world over.

In addition to his cartooning experience, Tatulli is also an accomplished filmmaker and animator, and is the recipient of three Emmy awards for his television work. His experience includes graphics and animation for such shows as “A Wedding Story,” “Trading Spaces: Boys vs. Girls,” “Epicurious,” and children’s DVDs.

Mark currently resides in New Jersey with his wife, son and two daughters. His children are the true joy of his life and the inspiration for much of his comic artwork.