This project traces the digital publishing history of the audiobook archive LibriVox.org, examining how its volunteers manage, control, and negotiate procedures and policies for their ongoing collaborative work. Examples of public knowledge work like LibriVox illustrate the value of professional and technical communication in accessibly digitizing knowledge and culture for use now and in the future. I investigate and theorize how groups of diverse and transient volunteers create and engage with the tools and documentation they use to manage their crowdsourced audio digitization work. The example of LibriVox can help us better recognize and value the invitational care work embedded in the professional and instructional documents we create, circulate, and consume.