p5, Rule 2 heading
Rule 2: Except for dots, join ⇒ Rule 2: Join

p10, QR code
The QR code is wrong, and is the same as for another puzzle. I’ve changed the webpage it points to so you can choose which of the two possibilities you want.

p12, para 1
end of each line and last row ⇒ end of each line and last column

p13, para 1
four well-known cities ⇒ four large cities

p26, puzzle
There is a single 6 which should be an e.

p28, para 3
This means that a few letter are ⇒ This means that a few letters are

p29, para 3
As before the snakes have no diagonals and ⇒ This time the snakes might have diagonals but

p42, para 4
That’s not a planet of any kind ⇒ It’s not a planet of any kind

p56, para 1
It is the last Sudoku in the book, not the penultimate.

p59, last line before puzzle
on page . ⇒ on page 70.

p64, para 3
top right ⇒ top left

p73, third para under heading Sudoku
nine rows of up of  ⇒ nine rows made up of