Hi,
have you checked your recommened reading list in the curriculum? It should have these books in there. Both highly recommended:

Alexandra Hough; Nelson Thornes, 2001 - 550 pages: Physiotherapy in Respiratory Care: An Evidence-based Approach to Respiratory and Cardiac Management

Jennifer A. Pryor, Ammani S Prasad; Elsevier Health Sciences, 6/03/2008 - 640 pages: Physiotherapy for Respiratory and Cardiac Problems: Adults and Paediatrics

Good luck, Fyzzio