Instruct: Classify the given review into positive or negative sentiment.
Query: Beware the Kindle edition - poor conversion

The kindle edition of this book is in the older Topaz format. As with other books in this older format that I have purchased, paging on my Kindle 2 is slower and sluggish compared to newer books.Fonts are sometimes odd - paragraphs will suddenly appear in a bolder font than their surroundings for no apparent reason. Lines of text will sometimes be set unevenly vertically as if the second half of the line were a superscript for the first half.Most importantly, however, is that I went to one of the sections where I was already familiar with the mathematics involved. Over the course of about 12 pages, I found two sections where, partway through a mathematical expression, there would suddenly be a large chunk of text missing, as much as half a page dropped out. I verified this on both my standalone Kindle 2 and the Kindle for PC software.