ISTJ is one the most intriguing personality types. But what's lurking beneath that calm exterior and reserved attitude remained unknown... until now. 33 Secrets From the Life of an ISTJ's unravels the mystery, exposing some of the most deeply held secrets of an ISTJ. From ISTJ's loyal and faithful nature to their affinity for following the rules to their preference to work alone, learn about this personality type in this succinct, informative and entertaining treatise that will make sure you'll never look at an ISTJ the same ever again