Can anyone recommend a book on agile UX design?

[Seth]

There don't seem to be a lot of good options. Any ideas?

[Davy]

I'd recommend:

Agile Experience Design: A Digital Designer's Guide to Agile, Lean, and Continuous

This can be the new book of March!

[Sven]

Lean ux from the lean series at o'reilley is what you are looking for

[Laura]

I will second the recommendation for Lean UX by Jeff Gothelf