Good primer-type IT security article in ABA Law Practice Today:
Cybersecurity for Attorneys: Addressing the Legal and Ethical Duties
Locked Down: Practical Information Security for Lawyers by Sharon Nelson and John Simek is a few years old, but remains a worthy treatise, supplemented by Sharon‘s Ride the Lightning blog. If epic fails amuse you, check out her post about the school board member who revealed more than intended during a virtual meeting.
Their Digital Detectives podcast is one of my favorites. The recent Penetration Testing podcast is worth a listen.