Where to Actually Find These Texts and What You Should Know Before Reading Them
The Apocryphal Acts Of The Apostles are a cluster of early Christian writings from roughly the second through fourth centuries that never made it into the canonical New Testament. They include the Acts of Paul, the Acts of Peter, the Acts of John, the Acts of Andrew, and the Acts of Thomas. That last one is the longest and most complete, running about 170 chapters in the original Greek. The others survive in fragments or later paraphrases. I used to look for clean English translations online and end up on pages full of pop-culture misinformation, so let me walk you through what actually exists and how to get it right. The standard collection is called the Acta Apostolorum Apocrypha, edited by Hermann J. von Soden and published in the late 1800s. That edition is in Latin and Greek and it is publicly available through the Internet Archive and HathiTrust. If you want the original languages, those scans are free. For English, you have a few options. The most reliable scholarly translation is in "The Apocryphal New Testament," edited by M.R. James, first published in 1924 and reprinted many times since. Oxford University Press and similar academic publishers still carry it. You can find a used copy for around fifteen dollars, or sometimes a digital reprint on Amazon. The text is straightforward but dry, and James includes some helpful notes. The Acts of Thomas is also translated separately in "The Apocryphal New Testament" collections from various publishers. Another option is the translation by Joseph B. Tyson and others in "The Apocryphal Acts of the Apostles," published by Brill in their series on early Christianity.
One problem I ran into is that several websites claim to offer "the complete apocryphal acts" but they mix in later medieval legends, pseudepigrapha, and outright fabrications. I once cited a passage from one of these sites in a paper and had to correct it because it was attributed to a text that doesn't actually exist under that name. The workaround is simple: stick to the von Soden critical edition for the Greek text and James for the English translation. If you need something more recent, look for peer-reviewed editions from Brill, Mohr Siebeck, or Cambridge University Press. Here is a practical note about accessing the original texts. The Bibliotheca Augustana project in Germany has digitized the von Soden edition for free. You can find it by searching for "Acta Apostolorum Apocrypha von Soden." It is in the public domain. The text is in Latin mostly, with Greek passages where the originals survive. If you read Latin, this is the most direct route. If you need the Greek, you may need to supplement with the edition by Paul von Gebhardt and Adolf Harnack, which is also available on Archive.org. For the Acts of Thomas specifically, there is a Syriac version that is actually more complete than the Greek. R.H. Connolly translated it into English in 1916, and that translation is available through various academic repositories. The Syriac text includes the famous "Judas Thomas" tradition that connects the apostle to India. If you are studying early Christianity's reach into South Asia, that version is essential.
A counter-intuitive point that beginners often miss: the term "apocryphal" here does not mean these texts are secretly true or especially valuable. It means they were excluded from the canon. Many of them are quite elaborate, almost novelistic in style, with miracle stories and romantic plots. They are useful for understanding what early Christian communities found compelling, but they are not reliable sources for historical facts about the apostles. The Acts of Paul, for example, contains the story of Paul and the bandit Silvanus, which is clearly legendary. It does not tell you anything verifiable about Paul's life. Another nuance is the question of dating. Scholars generally place these texts between 150 and 350 CE, but the exact dates are debated. The Acts of John may be earlier, perhaps around 150 CE, while the Acts of Thomas could be as late as the early fourth century. The variability makes it difficult to pin down when any given passage was written. If you need a working timeline, accept that the window is wide and move on. One more practical issue: some editions combine these texts with other apocryphal literature, like the Infancy Gospel of Thomas or the Letter of Lentulus. If you are only interested in the apostolic acts, check the table of contents carefully before you buy or download anything. I wasted money on a bundle that included a lot of material I did not need.
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If you want a starting point, begin with the Acts of Thomas. It is the most substantial and the most clearly structured. Read Connolly's translation first, then compare it with the Greek passages in von Soden. Pay attention to the Indian mission narrative and the ascetic themes. Those are the parts that shaped later traditions most significantly. The other acts are more fragmentary and harder to follow, but they are worth reading if you are interested in how early Christians imagined apostolic martyrdom and divine intervention.