Traditionally, a one volume “bir” of the Siri Guru Granth Sahib, which is written in the Gurmukhi script, has been used to read in Akhand Paths. However, if you do not read Gurmukhi, you may also use volumes with both the Gurumukhi and a translation into another language.
Here are protocols for handling a multi-volume Siri Guru Granth Sahib.
If you don’t already have one, here are some options for where to get copies of the Siri Guru Granth Sahib.
For English Translations
Visit Sikhnet’s Webpage Here