diff --git a/src/logic.rs b/src/logic.rs
index da39c0b..3311f2b 100644
--- a/src/logic.rs
+++ b/src/logic.rs
@@ -4,48 +4,56 @@ use serde::{Deserialize, Serialize};
 use std::fmt;
 
 #[derive(Default, Serialize, Deserialize, PartialEq)]
-enum StavKnihy {
+enum Stav {
     #[default] Nova = 0,
-    Pozicana = 1,
+    Pouzivana = 1,
     Poskodena = 2,
     Vyradena = 3,
 }
 
-impl fmt::Display for StavKnihy {
+impl fmt::Display for Stav {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            StavKnihy::Nova => write!(f, "Nova"),
-            StavKnihy::Pozicana => write!(f, "Pozicana"),
-            StavKnihy::Poskodena => write!(f, "Poskodena"),
-            StavKnihy::Vyradena => write!(f, "Vyradena")
+            Stav::Nova => write!(f, "Nova"),
+            Stav::Pouzivana => write!(f, "Pouzivana"),
+            Stav::Poskodena => write!(f, "Poskodena"),
+            Stav::Vyradena => write!(f, "Vyradena")
         }
     }
 }
 
 #[derive(Default, Serialize, Deserialize)]
 struct Kniha {
-    authors: Vec<String>,
-    title: String,
-    publisher: String,
-    genre: String,
-    page_count: usize,
+    autori: Vec<String>,
+    nazov: String,
+    vydavatelstvo: String,
+    zaner: String,
+    pocet_stran: usize,
     isbn: String,
-    year: usize,
-    pozicane: bool,
-    stav_knihy: StavKnihy,
+    rok_vydania: usize,
+    je_pozicana: bool,
+    stav_knihy: Stav,
 }
 
 impl fmt::Display for Kniha {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "({}, {}, {}, {}, {}, {}, {}, {}, {}",
-               self.authors.join(", "),
-               self.title,
-               self.publisher,
-               self.genre,
-               self.page_count,
+        write!(f, "(Autori: {},
+               Nazov: {},
+               Vydavatelstvo: {},
+               Zaner: {},
+               Pocet stran: {},
+               ISBN: {},
+               Rok vydania: {},
+               Je pozicana {},
+               Stav knihy: {})",
+               self.autori.join(", "),
+               self.nazov,
+               self.vydavatelstvo,
+               self.zaner,
+               self.pocet_stran,
                self.isbn,
-               self.year,
-               self.pozicane,
+               self.rok_vydania,
+               self.je_pozicana,
                self.stav_knihy,
         )
     }
@@ -54,5 +62,11 @@ impl fmt::Display for Kniha {
 
 #[derive(Default, Serialize, Deserialize)]
 struct Kniznica {
-
+    knihy: Vec<Kniha>
+}
+
+impl Kniznica {
+    // fn pridaj_knihu
+    // fn odstran_knihu
+    // fn daj_knihu_podla_isbn
 }