diff --git a/.codebook.toml b/.codebook.toml
new file mode 100644
index 0000000..22b36fd
--- /dev/null
+++ b/.codebook.toml
@@ -0,0 +1,8 @@
+words = [
+    "jali",
+    "listf",
+    "luser",
+    "mlftp",
+    "pdp",
+    "turist",
+]
diff --git a/README.md b/README.md
index d590492..feea938 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [Sudoku](https://en.wikipedia.org/wiki/Sudoku) is a logic based number-placement
 puzzle game originally from Japan. The word *sudoku* literally means
 *digit-single*. The objective is to fill a 9x9 grid with numbers between 1 and
-9, without having a number repeat in a row, column or a 3x3 subgrid. Normally,
+9, without having a number repeat in a row, column or a 3x3 sub grid. Normally,
 there are a few numbers preset. In a regular sudoku, the pre-filled numbers make
 sure, that exactly one solution for the puzzle exists.
 
@@ -48,17 +48,17 @@ The rules are the following:
   once.
 - Every 3x3 sub-grid must contain every number between 1 and 9 exactly once.
 
-## Solving Sudokus programatically
+## Solving Sudokus algorithmically
 
 ### Backtracking (naïve approach)
 
-Solving a Sudoku can be achieved in serveral ways. The most simple algorithm, is
+Solving a Sudoku can be achieved in several ways. The most simple algorithm, is
 a backtracking algorithm. With this a sudoku can be resolved basically by
 brute-forcing it. In this case, we walk through each cell of the grid
-recurseivly, and add a number. Then we check, if the grid is still valid. If it
-is, we recursivly move on to the next column. If we find a number that doesn't
+recursively, and add a number. Then we check, if the grid is still valid. If it
+is, we recursively move on to the next column. If we find a number that doesn't
 match, we return to the previous incarnation, and try another number. In order
-to check, if our grid is still valid, we can use simple function:
+to check if our grid is still valid, we can use simple function:
 
 ```C
 // Function to check, if it is save to place num at mat[row][col]
@@ -149,20 +149,20 @@ even without the front panel, but having the front panel is fancier. You can
 also run [simh](https://opensimh.org/) on a PC, but that would only be half the
 fun.
 
-The PiDP-10 shold be booted into ITS, as this is the OS, this project is running
-against. Now the only thing you need to do, is copy the source code files into
-the file system of your PiDP-10. You can do this by using the `mlftp` tool,
-installed on the machine your simulator runs on. You clone the repository and
-run the following commands from the command line:
+The PiDP-10 should be booted into ITS, as this is the OS, this project is
+running against. Now the only thing you need to do, is copy the source code
+files into the file system of your PiDP-10. You can do this by using the `mlftp`
+tool, installed on the machine your simulator runs on. You clone the repository
+and run the following commands from the command line:
 
 ```bash
 /opt/pidp10/bin/mlftp -w ITS "SUDOKU 1 JALI;" ./src/sudoku.s
-/opt/pidp10/bin/mlftp -w ITS "PUZZL1 SUDOKU JALI;" ./src/puzzle_1.sudoku
+/opt/pidp10/bin/mlftp -w ITS "PUZZLE 1 JALI;" ./src/puzzle_1.sudoku
 ```
 
 This will copy the source code file, and the example puzzle file onto the
-PiDP-10. Remmber to change the directory name in the ITS path form `JALI` to the
-directory you want to copy to.
+PiDP-10. Remember to change the directory name in the ITS path form `JALI` to
+the directory you want to copy to.
 
 You can now edit both files in EMACS on the PiDP-10. However, if you prefer to
 edit your code in a somewhat more modern environment (your favourite IDE, for
@@ -203,9 +203,9 @@ FREE BLOCKS #2=154 #3=169 #0=156 #1=171
 To invoke the solver run it with:
 
 ```
-:SUDOKU PUZZL1 SUDOKU
+:SUDOKU PUZZLE 1
 ```
 
-This will pass the file `PUZZL1 SUDOKU` to the program, and start to solve it.
+This will pass the file `PUZZLE 1` to the program, and start solving it.
 
 The result will be printed on the screen (once the project is finished).