Reddit mentions of The Sumerian Language: An Introduction to Its History and Grammatical Structure (Mesopotamia: Copenhagen Studies in Assyriology, 10)

This is quite late, but now that I'm more knowledgeable about resources for Sumerian I would like to recommend some:

Thomsen's [The Sumerian Language] (http://www.amazon.com/Sumerian-Language-Introduction-Grammatical-Multilingual/dp/8750036548/) is very useful to have even as a beginner and has been the traditional way of learning Sumerian. Good luck getting a hard copy of it though, its been out of print, so it's very difficult to obtain. Maybe try looking for it at a library? I'm sure there are online sources for it though.

Jagersma is also a good source for learning the grammar if you can't get your hands on Thomsen. Fully available online. It was his dissertation, so expect more up to date terminology and currents trends for understanding the grammar.

Edzard's Sumerian Grammar is also good.

With respect to each author, there will definitely be different perspectives on how to understand Sumerian, such as verbal forms, dimensional prefixes, conjugation prefixes, etc. It's up to you to decide what suits you best. My experience with Thomsen is that some of her explanations are ambiguous and the examples she uses can be overwhelming for a beginner (at least it was for me). There are definitely strengths and weaknesses to each of these grammars. Nonetheless, the resources provided are the basics to understanding the grammar and are no doubt useful and adequate for transcription and translation.

I want to stress that in order to the learn Sumerian grammar you need to work side by side with texts/cuneiform. It's definitely difficult to get a grasp of everything while reading the grammar without having lessons similar to Hughnergard's Grammar of Akkadian to guide you. It would be useful to start out with brick inscriptions and such. This is where John Haye's Manuel of Sumerian Grammar and Texts is useful because it provides lessons and such. I'm also confident you can find this easily. Hope this is helpful. Good luck.

Edit: How can I forget Labat. Definitely essential with understanding the development of sign forms and also provides signs values (French). There's also EPSD, but there are plenty of weaknesses of using this due to a lack of context, but nonetheless useful. Yeah... unfortunately there are a lot of expensive books in this field.