|Unlock Forum posting with Annual Membership.|
Interesting article on mildew from Virginia Cooperative Extension: "How to Prevent and Remove Mildew In Relation To The House and Household Furnishings" http://www.ext.vt.edu/pubs/housing/356-643/356-643.html
For leather book bindings and covers, wipe off the mold. Wipe the leather surface with a cloth dampened with a solution of one part denatured or rubbing alcohol to one part water. Apply saddle soap or leather conditioner.