Making a good book:
1. You have to create an empty book and an empty database first.
Give them names so that you can recognize them easily!

-> The empty database is for the games you will import into the book later.
2. Take your big database and search for games.

This games should be like the following:
- Make sure that you take only wins!
- Use only mated games!

Ok when you now have your big database in front of you do following:
1. Search first for white wins:
Eco: B00-C99 , 1-0 , Checkmate, 1-80 moves , Elo of players is not important
When you have these games copy them into the empty new database

2. Now you can search for black wins:
Search against every white opening only one black answer 
An example: 1. e4 c5 or 1. d4 Nf6 -> if you have only 1 answer on every move
then your book does not become so big, because big books make your hardware 
slower
My suggestions for openings as black:
1. e4 c5; 1. d4 Nf6; 1. c4 e5; 1. Nf3 c5; 1. b3 c5; 1.f4 c5; 1. g3 e5;
1. Nc3 c5; 1.b4 c6; 1.g4 e5; 
But first search only for all black wins you can find:
Eco: A00 - E99; 0-1 ; Ckeckmate; 1-80 moves; Elo : both 2400-9999
If you have these games copy them too in the new database where the white wins
already are

When you have now copied all games in the new database , please open your 
empty book
1. Import all games in it (might take some time)
2. Make Priority Analysis as following: First with the white wins 
+ Repertoire White
Then for the black wins (Repertoire Black activate)

When you have done that then look for the openings you want to play
Here are my suggestions: Mark them in your opening book as green and
all other alternatives as red 
When you play white:
e4 c5 Nf3 d6 d4 c:d4 N:d4 Nf6 Nc3
->a6 -> Be3
->Nc6 -> f3
->g6 -> Be3
->e6 -> g4
->Nbd7 -> Be3
->Bd7 -> Bg5
->e5 -> Bb5
->Qc7 -> Be2
->Qa5 ->Bd2
->h6 ->Be3
->b6 ->Bb5+
->Be6 -> N:e6
e4 c5 Nf3 Nc6 d4 c:d4 N:d4
->e6 ->Nc3
->g6 ->c4
->d6 ->Nc3
->e5 ->Nd4-b5
->Qb6 ->Nd4-b3        These are all not the main variations
->d5 ->e4:d5                Black's main variation is Nf6
->Qc7 ->Nb1-c3           Answers against it you can see underneath
->Qa5 -> Nb1-c3
->a6 ->c4
->N:d4 ->Q:d4
->Ne5 ->Nc3


-> Nf6 Nc3
Black's moves after Nc3:
->d6 ->f3
->e5 -Nd4-b5 (strong for black)
->e6 -Nd4:c6
-a6 -N:c6
-g6 -N:c6
-Qb6 -Nb3
-Qc7 -Ndb5
-Qa5 -f3
-Rb8 -Be2
-h6 -N:c6
-d5 -Bb5
e4 c5 Nf3 e6 d4 c:d4 N:d4
->Nc6 -> Nc3
->a6 ->Bd3
->Nf6 ->Nc3
->Bc5 ->Be3
->d6 ->Nc3
->Qb6 ->Nc3
->Qc7 ->Bd3
->d5 ->Bb5
->e5 ->Nf3

If black plays e4 e6 then you mark in the book: d4
You go on like this:
e4 c6 d4
e4 d5 e:d5
e4 Nf6 e5 Nd5 d4
e4 e5 Nf3 Nf6 N:e5
e4 e5 Nf3 Nc6 Bb5
e4 d6 d4
e4 Nc6 d4
e5 g5 d4
e4 g6 d4

If you are black play as following:
e4 c5 Nf3 Nc6 d4 c:d4 N:d4 Nf6 Nc3 e5
d4 Nf6 c4 e6
d4 Nf6 Nf3 e6
c4 e5
b3 c5
b4 c6
Nf3 c5

Good luck!!!