THIS TEXT IS DESIGNED AS A FIRST COURSE IN SOLID STSTEPHYSICS FOR UNDERGRADUATE STUDENTS.A KEY OBJECTIVE IS TOPRESENT THE BASIC CONCEPTS IN AN EASILY ACCESSIBLE CONTEXTTHUS,FOR EXAMPLE,WAVE PROPAGATION IN CRYSTALS ISINTRODUCED USING ONE AND TWO-DIMENSIONAL GEOMETRIES.THEGENERALIZATION TO THREE DIMENSIONS AND THE ELEGANT FRAME-WORK OF THE RECIPROCAL LATTICE IS MADE ONLY AFTER THEBASIC IDEAS HAVE BECOME FAMILIAR.THE MANCHESTER PHYSICS SERIES IS A COLLECTION OF TEXTBOOKSSUITABLE FOR AN UNDERGRADUATE DEGREE COURSE IN PHYSICS.EACH BOOK HAS BEEN INDIVIDUALLY DEVELOPED TO PROVIDE ARELIABLE,SELF-CONTAINED TEXT FOR AN UP-TO-DATE COURSE.EACH BOOK CAN BE USED INDEPENDENTLY OF THE OTHER BOOKSIN THE SERIES,WHILE THE ORGANIZATION AND SCOPE OF EACHBOOK ALLOWS CONSIDERABLE FLEXIBILITY IN THE SELECTIONAND ARRANGEMENT OF DIFFERENT COURSES.