Neznam, ja nisam mogao nikako dobiti item - btw evo pise i na wikipediji.
Bug
On the PC version there is a bug in this quest. Methredhel gets to the diary almost immediately, and although the map indicates that the book is in her chest in her house, it does not appear in the chest when it is opened. It is not possible to pickpocket Methredhel for it since she is not carrying it. Even after 30 days Methredhel never takes the diary to Amantius, and the secondary method of entering the Guild is never triggered. It is therefore impossible to join the Thieves Guild should this bug happen. (It doesn't happen in every game)
Use the cheat player.additem 000355ED 1 to get the diary and give it to Amantius to complete the quest and join the guild.