Dear Yolanda,
Thank you for your question. I would suggest asking members about what they would like to get out of the book club, then based on the responses, the membership can develop shared goals and expectations of members. Depending on the nature of the projects, you might consider soliciting feedback from book club members frequently and checking in with your team members to ensure that your organizational goals are met as well.
Take a look at Ch. 8 and 9 of the toolbox.