Where can you get braille books?

It depends on the country in which you live, and what you mean by braille dictionary.

Braille is a more complex writing system than print. It uses many different abbreviations and contractions to save space. There are dictionaries of Words that are frequently transcribed incorrectly because of confusion about contraction rules. This is the most common type of braille dictionary. The Word is listed in uncontracted braille, followed by the correct contracted braille form of the Word. Because different countries have slightly different rules for braille contractions (even in countries that speak the same language), you will need a separate dictionary for each country. In North America, you can purchase one of these problem-Word dictionaries from The Hadley School for the Blind.

Regular dictionaries (with definitions) that have been transcribed into braille are enormous and extremely uncommon. They are generally produced on a one-off basis by volunteers. Ones available for sale can run thousands of dollars and comprise over a hundred volumes. They are only owned by schools for the blind, rehabilitation centers or extremely wealthy private individuals. For everyday use, blind people use computer dictionaries or hand-held talking dictionary devices like those manufactured by Franklin Electronics.