The Clinical Neurophysiology Primer
Andrew S. Blum, Seward B. Rutkove
Humana Press
This would make a good book to review early in an electrodiagnostic residency.  The chapters are brief, and each chapter has review questions that are very helpful.  There are several mistakes in the book however, and it seems it was not thoroughly edited.  It is not detailed enough for a good reference book during practice in electrodiagnostic medicine or for taking the ABEM exam.