[Gaessaki]

Managing the Professional Service Firm by David Maister.

No longer doing consulting, but found it invaluable as a tech person building a consulting team and trying to break into enterprise. Probably useful for any professional consulting through a firm (lawyers, accountants, big 4, etc.)

Someone mentioned Designing Data Intensive Applications which I’m partial to as well.

[rodolphoarruda]

Leading Firms, David C. Kuhlman.

I read this one during a period of 4 years when I saw myself neck deep into consulting services managing both development projects and implementations. The book was so much aligned to the reality of things in the field that I started to check mark paragraphs so I could be counting them later.