This is the solution given in the book, however I think it is wrong.
In my opinion, white can kill after (see next 2 diagrams)
Therefore, I think this should be the correct solution diagram. Anyone agrees, or am I missing something?
Djaian First of all, your solution doesn't work
a and b are miai, black will die.
What you didn't see is that black can kill the 2 white stones in the corner if white tries to kill black.
...but that's not true. See the following response of unkx80. Thanks.