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The latest version of the book is B4.0, released about 1 month ago. If you've bought a PDF of the book and would like to update it to this version (for free), visit your home page.

By default this page displays the errata for the latest version of the book. If you have a previous version, select it here:

If you've found a new error, please submit it.

  • Typo
  • Tech. error
  • Suggestion
  • Maybe next edition
  • Not a problem
  • Reported in: B4.0 (12-Jan-20)
PDF page: 112
On the image of page 112, the content type is set to "application/edn"; however when the button "Try it out" is pressed the response body is "Malforme...more...
  • Reported in: B4.0 (20-Jan-20)
PDF page: 145
This line: Next, we need pass our timeout and our callback function from :message/send! : Is missing "to", and should be: Next, we need to pa...more...
  • Reported in: B4.0 (18-Dec-19)
PDF page: 196
'''print i''' is not perfectly valid Python code anymore. It was in Python2 (whose support ends this year), but in Python3 one should use '''print(i)'...more...