One of the earliest works of this Italian philosopher and literary critic, Aesthetic as Science of Expression and General Linguistic marks the beginning of Croce's elaboration of his highly influential ideas of aesthetics. Croce defines art in terms of intuition and expression, thus replacing beauty as the primary criterion for aesthetic evaluation.

Commissioned by the US War Department and written in 1859 by a decorated US Army captain, The Prairie Traveler is a complete how-to travel guide for the westward-bound pioneer. Covering topics from first aid for rattlesnake bites to how to travel 70 miles across the desert without water for one's livestock, the guide includes 28 travel itineraries with mileage and firewood availability.