I have been getting ebooks through our local library for my visually impaired mother-in-law. She enjoys mysteries so we have been frustrated with a limited selection of books without a long wait for a title to become available. It is next to impossible to read a series in order. She uses a tablet and have been downloading books in the kindle format. We have set the tablet up for white lettering on a black background in a large font. Does bookshare work the same way with a limited number of copies with a waiting system or are all books simply available? Can it be set up with white lettering on a black background?