Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Missing Vowels

This book is a rather large dictionary of a reconstruction of Proto Germanic. Those parts that are readable are very interesting. However, for some reason many words have blank spaces where a vowel should be. This is especially pronounced in the words that begin with s. For example, there is an enty *sl wan. The text of the entry relates the proto form to OE sliw, MLG sl , and OHG sl o. I have no idea what the vowels in the proto form and the German forms were. Also, I checked the website of the publisher, and I was unable to find errata. For the price I paid, this sloppy editing is unacceptable.