Professor Massimiliano Tarozzi 
What is Grounded Theory? [PDF ebook] 

What is Grounded Theory? provides a compelling account of an approach that has come to be one of the most widely used qualitative research methods across a wide range of subject areas and in the disciplines of nursing, health sciences, computer science, marketing, social psychology and education, among others.

Drawing on two decades of research practice and teaching, Tarozzi explains
what Grounded Theory (GT) is, exploring its historical context, the many and sometimes antithetical approaches that have emerged of it and the epistemological implications of its application to different disciplines. With chapter summaries, further reading lists and a wealth of practical examples, the author shows
how to do GT, accompanying the reader through the various phases of the research project.

Using GT in research is an adventurous journey: one can only understand
what GT is by doing it.