If you want to find out more, travel to Phoenix Valley and see the help of Master Lu (42, 70). He will help you by telling you where to find the Volumes.

Lake Volume (Increases your wuxing creativity by 10 points when you read it.)
It is written that if put a Crab Leg, Phoenix Feather, Dragon Squama, Ivory and a Sutra into slots 3, 9, 5, 7 and 12 respectively and set the Sutra as the main element, you will create a Thunder Volume.

The Lake Volume appears in the following locations:

First of all, it will appear by the Water City Fountain, where it is usually quickly discovered and picked up.
After that, it will appear randomly in one of the following places:

Sand City (92 53), Eastern Oasis (42 05), Love Valley (40 22), Moon-scene Valley (14 38), Silver Valley (19 16), Goose Valley (17 21), Horse alley (72 42), Bandit Cave Entry (32 21), Green Cave (23 40), Snow Plain (14 25), Bird Valley (16 23), Spring Bridge (54 59), Rich Plain (60 79), Western Snow Hill (38 49), Water City Suburb (31 40), Hill Of Tear (32 21), Moon Bridge (11 15), Leisure Garden (34 43), Bamboo Forest (27 13), Bluff (25 22), Western Dock (36 08), Eastern Dock (24 18), Soul Lost Cliff (10 27), Stone Cave Entry (38 17), Resent Cave Entry (65 64).

Fire Volume (Increases your wuxing creativity by 20 points when you read it. )
In the Fire Volume it is written that: If you put Soapbark Shoes, Wolf Claw, Crab Leg, Dragon Squama and a Crocodile bone into slots 3, 9, 7, 12, 5 respectively and then set Soapbark Shoes as the main element you will make a Wolf Boot.

Wolf Boot: -100HP, +1000MP, -50Atk, +500 Dex, Level 1000.

Thunder Volume (Increases your wuxing creativity by 30 points when you read it.)
In the Thunder Volume it is written that: If you put a Mermaid Tear, Phoenix Feather, Ivory, Turtle Shell and a Wavy Pendant into slots 3, 9, 7, 12, 5 respectively and set Wavy Pendant as the main element, you will make a Life Lock.

Life Lock: +300HP, -50Atk, Level 1000.

Earth Volume (Increases your wuxing creativity by 40 points when you read it.)
In the Earth Volume it is written that: If you put a Golden Bracelet, Mermaid Tear, Wolf Claw, Turtle Shell and Dragon Squama into slots 7, 3, 9, 12, 5 respectively and set the Golden Bracelet as the main element, you will create a Dragon Goblet.

Dragon Goblet: +200HP, +230Def, +200 Dex, Cultivation 20,000

Mountain Volume (Increases your wuxing creativity by 50 points when you read it. )
In the Mountain Volume it is written that: If you put a Moon Vest, Moon Vest, Ivory, Dragon Squama, Crocodile Bone and Crableg into slots 12, 11, 7, 3, 9, 5 respectively and set the Moon Vest in slot 12 as the main element, you will create a Justice Armour.

Justice Armour: +400HP, +2000MP, -100Atk, +300 Def, +100 Dex, Cultivation 20,000.

Water Volume (Increases your wuxing creativity by 60 points when you read it.)
In the Water Volume it is said that: If you put a Turtle Shell, Crab Leg, Ivory, Mermaid Tear, Phoenix Feather and Dragon Squama into slots 12, 11, 7, 3, 9, 5 respectively and set the Turtle Shell as the main element, you will create a Caution Book.

You can use this book to teach your marching pet the skill: Caution. This skill transfers your some of your
pet's attack power onto their defence.

Wind Volume (Increases your wuxing creativity by 70 points when you read it.)
In the Wind Volume it is written that: If you put a Turtle Pill, Cloud Pill, Tear Pill, Phoenix Pill and a Dragon Pill into slots 12, 7, 3, 9, 5 respectively and set the Turtle Pull as the main element, you will create a Blue Crystal. A Blue Crystal is a very powerful poison, equal to the power of 5 of the strongest poisons that you can normally make in the oven.

Heaven Volume (Increases your wuxing creativity by 80 points when you read it.)
In the Heaven Volume it is written that: If you put a Life Pill, Super Herb, Ice Stone, Poisonous Herb and Millenial Pill into slots 12, 7, 3, 9, 5 respectively and set Life Pill as the main element, you will create an Occult Pill. Use the Occult Pill to gain 10 levels.

Secret Book (Increases your wuxing creativity by 1000 points when you read it.)
First of all, collect all of the eight volumes. Then, put them in their corresponding slot in the
WuXing Oven. (Ie: Heaven Volume goes into the Heaven Slot and Fire Volume into the Fire Slot).
Set the Heaven Volume as the main element by right clicking it and you will produce a Secret Book.

Use the book to gain 1000 WuXing Points!

PS: Locations of the materials
You can get the materials by fighting in the following locations:
Turtle Shell: Hill of Tear
Dragon Squama: Terrifying Cave 1
Wolf Claw: Treading Plain
Phoenix Feather: Phoenix Valley
Crocodile Bone: Eastern Dock
Ivory: Western Snow Hill
Crab Leg: No Return Shore

Finally, the Mermaids tear can be obtained by completing the Pingpongfish Quest, then giving the Necklace
to the Mermaid in Ocean City. The Mermaid will give you one of her tears as a reward for giving her the
necklace.