Unfortunately, I have just learned that the course book that we used to have on the course is presently out of print. No new edition is planned by the publishers.
   I still recommend the book for supplementary reading. You might find copies in the main University library and also at the library of the Physics Department and/or at Theoretical Physics.
   It is good for the future to have a reference book on Group Theory. As such I recommend the book by Morton Hamermesh, Group Theory and its Application to Physical problems,  because it is a good book, and a standard book and it is issued by Dover Publ. and is thus relatively cheap.