Challenge Books for study

[piranime]

edit [my fault there is a valid solution]

I got the links =)

i will not post them until the author of this fun challenge autorize me =)

Have fun with it

[leonardonhesi]

Hello piranime
You really found the passwords .....
I hope I have contributed to that you practice your skills.
If you want to release the passwords only ask that you do through a tutorial explaining as did so that others can study.

Thanks and until the next