Available from the ABA:

Epstein, Phyllis
Women-at-Law: Lessons Learned Along the Pathways to Success (2004). Interesting discussion with many perspectives on how women can succeed in law.

Foonberg, Jay
How to Start and Build a Law Practice, Fifth Edition (2004). This is a classic on learning how to develop a law practice, whether it's as a solo or within a small firm.
How to Get and Keep Good Clients, Second Edition (1994). You want clients, yes, but you really want good clients. This book will help you identify, attract, and keep good clients - and it'll help you deal with challenging clients.

Gibson, K. William
Flying Solo: A Survival Guide for the Solo and Small Firm Lawyer, Fourth Edition (2005). Another classic, focusing exclusively on the sole practitioner.

Herrmann, Mark
The Curmudgeon's Guide to Practicing Law (2006). Blunt and savvy advice from a Jones Day partner. Excellent advice for thriving in a law firm.

Kaufman, George
The Lawyer's Guide to Balancing Life and Work: Taking the Stress Out of Success (1999). Avoid, cure, or cope with burnout by balancing your personal life with your professional life. Every lawyer should read this.

Riskin, Gerald
The Successful Lawyer: Powerful Strategies for Transforming Your Practice (2005). Endorsed by Tom Peters (In Search of Excellence), this book presents practical ways to improve effectiveness, client relations, and more.

Sapp, John
Making Partner: A Guide for Law Firm Associates, Second Edition (2002). Strategies for career development if your goal is to make partner.

Snyder, Theda
Women Rainmakers' Best Marketing Tips, Second Edition (2003). Practical tips for all rainmakers (or rainmaker-wanna-bes), male and female.

Staudenmaier, Heidi McNeil
Changing Jobs, Third Edition: A Handbook for Lawyers in the New Millennium (1999). The title is a bit dated, but the information is not. Suggests an introspective, yet strategic, approach to job-seeking.

Vogt, M. Diane and Rickard, Lori-Ann
Keeping Good Lawyers: Best Practices to Create Career Satisfaction (2000). Associate retention is a hot issue, and this book explains why and how to maximize associates' career satisfaction.

Others:

Burg, Bob
Endless Referrals, Third Edition. Excellent networking book.

Gerber, Michael
E-Myth Mastery : The Seven Essential Disciplines for Building a World Class Company. Love it or hate. How to succeed as a small, or not-so-small, business.
The E-Myth Revisited: Why Most Small Businesses Don't Work and What to Do About It. Revised and updated. Do you work in your business or on it? To survive, you need to do both. A short book that's packed with eye-openers.

Greenberg, Hindi
The Lawyer's Career Change Handbook: More Than 300 Things You Can Do With a Law Degree. A classic on changing careers with a JD.

Kieves, Tama J.
This Time I Dance. A Harvard-educated lawyer's story of leaving the practice to fulfill her creative dreams. Terrific for those who decide to leave the law.

Mackay, Harvey
Dig Your Well Before You're Thirsty: The Only Networking Book You'll Ever Need. A classic.

Richardson, Cheryl
Take Time For Your Life. Eliminate or correct what isn't working in your life so you can maximize what does work.
Stand Up For Your Life. Taking charge of your life, defining your values, setting boundaries, and ultimately living your vision.