I'm a Speech and Language Therapy student and I've found this book really useful for all the biological and medical aspects of the course. It covers loads of different topics in a good amount a detail (not overly technical, but detailed enough). The bits I've read so far seem mainly anatomy and physiology based, rather than about disorders (e.g. it describes the structure and function of the ear, but not much on hearing impairment). There's also good diagrams in it. I think it'll be a handy one to keep for looking up things in the future.