[Steven]

So I reworked a book found on archive.org with "Scan Tailor" software and then imported the jpegs into MobileSheets. The yellowish background of these jpegs switched to blue in MobileSheets. When I printed the assembled jpegs with "microsoft print to pdf" from inside Mobilesheets, the background stayed blue (as viewed with other pdf readers). Trying a different method, I assembled the pdf from jpegs using "PDFcreator free" and the color did not shift. The displayed pdf then showed the original color within MobileSheets. While the blue shade is actually very nice, it is not likely what you intended.  I have done large file assembly (up to 300 pages) before with MobileSheets and never had a problem with color shift.