(Version 5.2 is nestled somewhere else, if you are curious about the version skip ;) )
SteelMod v5.3 is a small but needed fix correcting spelling errors in the class books, so that when read, it does not throw silent errors at you and allows you to actually craft what you've learned. The remaining icons that were missing, including the starter class book, were also added, thanks to our friend AaiRez at SA Gaming.
This version is needed in order to get the most out of the MP version, since the spelling errors did not throw any nulref's your way when read, it just wouldn't give you all the recipes. Now, you should be able to find and read all the books no problem!