The beginning of a well known book has been encrypted below. Each letter of the alphabet has been replaced by another using a simple substitution technique. For example, A may always be represented by G, etc. Can you name the book?

The piece of text is from the original book and should read:

Now Rann the Kite brings home the night
That Mang the Bat sets free -
The herds are shut in byre and hut
For loosed till dawn are we.
This is the hour of pride and power,
Talon and tush and claw.
Oh, hear the call! - Good hunting all
That keep the Jungle Law!
Night-Song in the Jungle

a has been represented by m.
b has been represented by o.
c has been represented by n.
d has been represented by k.
e has been represented by e.
f has been represented by y.
g has been represented by z.
h has been represented by x.
i has been represented by w.
j has been represented by v.
k has been represented by u.
l has been represented by t.
m has been represented by s.
n has been represented by r.
o has been represented by q.
p has been represented by p.
q has been represented by l.
r has been represented by j.
s has been represented by i.
t has been represented by h.
u has been represented by g.
v has been represented by f.
w has been represented by d.
x has been represented by c.
y has been represented by b.
z has been represented by a.

Puzzle 1002

What is represented by this BrainBat?

[Ref: ZEHL] Copyrighted.

Hint: Say what you see.

Answer: Don't look back.

Puzzle 1003

I once cashed a cheque at the bank. I had spent £0.68 before I realised the bank clerk had made a mistake. He had transposed the pounds with the pence. I now had exactly twice the value of the original cheque. What was the original cheque's value?

Using the digits 1, 2, 3, 4, 5, 6, 7, 8, 9, can you make 100?

You can use addition, subtraction, multiplication, and division, as well as brackets.

However, they must stay in the same order and you cannot join two digits to make another number, e.g. 1 and 2 cannot be used together as 12.

[Ref: ZUDL]

Hint: Try this using a calculator.

Answer:
1 + 2 + 3 + 4 + 5 + 6 + 7 + (8 x 9) = 100.
(1 x 2 + 3) x 4 x 5 + 6 - 7 - 8 + 9 = 100.
-(1 x 2) + (3 x 4) + 5 + 6 + 7 + (8 x 9) = 100.
(1 + 2 + 3 + 4 + 5) x 6 - 7 + 8 + 9 = 100.
(1 + 2 + 3 + 4) x (((5 - 6) x (7 - 8)) + 9) = 100.

Puzzle 1005

Starting with BALL, change one letter at a time until you have the word HEAD. Each change leaves the other letters in their original places and must result in a proper word. What is the minimum number of steps required to achieve this change?