Handbook of Neurosurgery by Mark Greenberg. Currently in the 8th Edition. Indespensible resource for the junior resident or SubI. Older editions such as the 7th Edition or the 6th Edition are still avilable and relevant.

Fundamentals of Operative Techniques in Neurosurgery by Connolly et al. Useful pocket book for neurosurgical techniques

Diagnostic Imaging: Brain by Osborn. Introduction to diagnostic neuroradiology. Very good for medical students and junior residents

Marino's The ICU Book by Marino. Excellent handbook for management of patients in the ICU.

The NeuroICU Book by Lee. Broad handobok for management of patients in the neuroICU. Great to have to reference