The actual wording of the Texas Open Meetings Act is found in the Government Code of the Texas Statutes. Every law library will have a copy of the Government Code. If you go to a law library (most courthouses have law libraries) ask for the Black Statutes. The "black" refers to the color of the book bindings. The books are also referred to as Vernon's Annotated Statutes.
The TOMA is also available on the web. The advantage of reading the TOMA in the Government Code is that it will contain what lawyers call "squibs." Squibs are one paragraph summaries of cases that discuss the Act itself. However, squibs are not law. They cannot be cited to a court. The summaries are not written by courts, and they can sometimes be less than complete. What they are great for is telling you which cases or AG opinions you should read in their entirety.
For AG opinions, click here.
For a copy of the actual wording of the statute, click here.
For my personal index of the TOMA, click here.