Until its seventh edition
Until its seventh edition, this book bore the designation "First Half," a label removed after the author claimed presenting the "Second Half" would require rewriting this book.  It begins by quoting Plato's Sophist about the use of a certain term as perplexing and the question to the meaning of that term is given "ontic" and "ontological" priority.   The method of investigation is termed phenomenological, explaining why this work is dedicated to the author's teacher Husserl. With the second titular concept compared with "everdayness" and progression to death and first titular concept refined to "-with" and "as such" varietes among others, FTP, identify this 1927 book exploring Dasein by Martin Heidegger.
Until its seventh edition, this book bore the designation "First Half," a label removed after the author claimed presenting the "Second Half" would require rewriting this book.  
{Being} and {Time} or {Sein und Zeit}