I use plastic bins and desiccant packets in a tropical environment but not together; the lids on standard plastic bins are too loose-fitting for this to work. T

I use plastic bins and desiccant packets in a tropical environment but not together; the lids on standard plastic bins are too loose-fitting for this to work. The packets will be too rapidly spent. If you get the kind with color-changing pellets to tell you how saturated the packet is, it's obvious. You need something that's actually airtight. Best is if you can vacuum seal the item together with some desiccant packets. Second best is a Ziploc bag. But for books, this is all a bit too much effort for me, too. Kindles don't mold.