First, the original book by Glaser and Strauss, "Discovery of Grounded Theory" is not a how-to-do-it book. Instead, you will find that kind of advice in more recent books such as:
Strauss, A., & Corbin, J. (1998). Basics of qualitative research (2nd ed.). Thousand Oaks, CA: Sage.
I personally recommend the 2nd rather than the 3rd edition of this book because Strauss died shortly before this one came out, so he was not involved in the extensive revisions in the 3rd edition. To be blunt, I think the 3rd edition is simply not as good as the earlier two.
Another widely used book is:
Charmaz, Kathy. 2006. Constructing Grounded Theory: A Practical Guide through Qualitative Analysis. Thousand Oaks, CA: Sage Publications.
That book is supposed to be coming out in a 2nd edition any time now, so you might wait before you order it.
Also, I don't know if the field of Management Information Systems is relevant to your work, but you can find a number of studies there that use Grounded Theory.
As a Glaserian or classical grounded theorist I would recommend you to take a look at: http://www.groundedtheory.com Please check What is GT? and GT books - with excerpts from Glaser's latest books.
Of course there is the original work Discovery of grounded theory by Glaser and Strauss from 1967. But there are two other books written by Barney Glaser that I find very useful to get started with: Theoretical sensitivity, 1978 and Doing grounded theory, 1998. The last title was translated to Swedish in 2010 - Att göra grundad teori - problem, frågor och diskussion. These books can all be ordered via www.sociologypress.com/book.htm
Bianca, you may find it interesting (and entertaining) to read Thomas and James’ (2006) energetic and wide-ranging critique of grounded theory. In it they claim that there is little in the approach to distinguish it from normal qualitative studies: it ‘oversimplifies complex meanings and interpretations in data … constrains analysis … depends upon inappropriate models of induction and asserts from them equally inappropriate claims to explanation and prediction’ (p.768). Although the article relates to use of grounded theory in education, it is useful for any researchers using the approach to consider how to respond to their critical appraisal.
Thomas, G. and James, D. (2006). Reinventing grounded theory: some questions about theory, ground and discovery. British Educational Research Journal, 32(6) December, pp.767-795.
Read Glaser and you will be left in little doubt as to how different GT is from other qualitative research. I suggest that you start with Glaser (1998) Doing Grounded Theory: Issues and Discussions. Sociology Press. Mill Valley. Don't forget Glaser(1978) Theoretical Sensitivity. Sociology Press. Go to original sources rather than reading other peoples' interpretation.