Hello, The 100 book download limit is based on a 30 day cycle. If 100 books were downloaded on day 1, additional books wouldn't be available until day 31. If 1 book was downloaded on day 1 and 99 books were downloaded on day 2, on day 31, 1 book would be available. On day 32, 99 books could be downloaded. In other words, it's a revolving thirty day counter. We can increase the 100 book download limit if necessary. If you exceed your book download limit, email: support@xxxxxxxxxxxxx<mailto:support@xxxxxxxxxxxxx> to request an increase. Please do not ask us to update your book download limit unless you exceed your limit or you are just a few books shy of doing so. . Remember, you do not need to download all the books you want to read at one time. Once the books are in our collection, they are backed up and won't be lost. Regards Rob Turner robt@xxxxxxxxxxxx<mailto:robt@xxxxxxxxxxxx> 650.644.3424 Bookshare Support