PLEASE NOTE; the download size quoted is not to be taken as gospel because it varies considerably depending on the software used to convert it. Because I  use a number of non-web safe fonts and even though I had converted all the books  to PDF which is supposed to solve that problem   some computers and what have you were still converting some fonts to  the nearest that was available resulting in a horrible looking mess. Consequently I  converted them all to images which has increased their size or weight considerably with this book becoming 126 MB nevertheless you  got what I thought you would. However I am now using  a pdf converter that truly appears to be embedding all used fonts which has decreased this books size / weight according to some bugger to 20.52 MB.  Although having said that if your phone or whatever can display the web-site and you can navigate your way through it to the download page I guess it should display the downloaded book, I know all my gizmos do. Although the bigger the screen the easier they are to read, likewise the smaller the screen the harder it is to read.