Instruct: Classify the given review as either positive or negative.
Query: Marred by Errors

This seems to be a decent enough biography that gives some insight into Shepard the man, his background and drives. However, I must caution that it contains many errors of fact that seem to be related to the author's apparent ignorance of the military, aviation and space. These errors range from niggling (referring to flying boats as "seaplanes) to significant (stating that modern aircraft are controlled by a "steering wheel" rather that a stick and rudder pedals, when in fact a stick is still the preferred control for high-performance aircraft). The shame is that these errors could easily have been, and should have been, caught by proper review and editing - so the publisher has to take some of the blame.