| Book cover | /pub/sinclair/books-pics/m/MasteringMachineCodeOnYourZX81OrZX80.jpg | 58,265 | - | | | |
| Book cover | /pub/sinclair/books-pics/m/MasteringMachineCodeOnYourZX81OrZX80(MasteringMachineCodeOnYourZX81)(RestonPublishingCompanyInc).jpg | 194,174 | - | | | |
| Complete book | /pub/sinclair/books/m/MasteringMachineCodeOnYourZX81OrZX80(MasteringMachineCodeOnYourZX81)(RestonPublishingCompanyInc).pdf | 22,262,056 | - | | | |
| Complete book | https://archive.org/download/masteringmachinecodeonyourzx81/MasteringMachineCodeOnYourZX81.pdf | - | - | None | | |
| Complete book | https://archive.org/download/mastering-machine-code-on-your-zx-81/Mastering%20Machine%20Code%20on%20your%20ZX81.PDF | - | - | None | | |