Crossword Puzzle - April 2015

I have something very special for you this month. To celebrate the release, earlier this month, of my new book, Heaven and Earth (If you don't know about it yet, where have you been?), the first person to successfully complete this puzzle, and send me the answers, will receive a free electronic copy of the new book!

That's right - simply complete this puzzle, and e-mail me your answers. I'll be publishing the correct answers on this blog, on Tuesday 26 May 2015, and I'll publish the winner's name there. The winner will also be announced in my May 2015 newsletter, so sign up if you don't want to miss it.

Ready? Go!

Clues

Across

1 Writer, Hamlet (11)

8 No problems here (3)

9 '80s mountain bike (3)

10 Informal, you (3)

11 Grain or corn (4)

13 Joe Dever's monastic order (3)

14 Precious stone (3)

15 The zest of a lemon (9)

17 South African police (4)

18 Often eaten with gravy (3)

19 Soap (3)

20 On top of (4)

23 Mother Theresa (9)

25 de Janeiro (3)

26 Slang for steal (3)

27 Expressing surprise (4)

28 Modern symbol of slavery (3)

29 Salty water (3)

30 To row a boat (3)

31 Dissipation of heat from the body (adjective) (11)

Down

2 Japanese Samurai sword (6)

3 Earliest ancestor of the horse (8)

4 Why is it blue? (3)

5 To do exceptionally well (5)

6 Of Einstein (11)

7 Complete removal (11)

12 Said while scratching your head (2)

13 Afrikaans food (3)

14 Prefix denoting past tense (Afrikaans) (2)

16 Better than usual (8)

21 Nocturnal bird's abode (6)

22 To vex (3)

23 Broader (5)

24 Blind Discworld god (2)

25 Sun god (2)

28 Also (3)