diff --git a/app/src/main/java/com/example/citrusclient/viewmodels/BooksViewModel.java b/app/src/main/java/com/example/citrusclient/viewmodels/BooksViewModel.java
index 7dde738..a1260c8 100644
--- a/app/src/main/java/com/example/citrusclient/viewmodels/BooksViewModel.java
+++ b/app/src/main/java/com/example/citrusclient/viewmodels/BooksViewModel.java
@@ -1,4 +1,210 @@
 package com.example.citrusclient.viewmodels;
 
-public class BooksViewModel {
-}
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.example.citrusclient.models.Book;
+import com.example.citrusclient.rest.BooksRest;
+
+import java.util.ArrayList;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+
+public class BooksViewModel extends ViewModel {
+
+    private final Retrofit retrofit;
+
+    private final BooksRest booksRest;
+
+    private final MutableLiveData<ArrayList<Book>> booksLiveData;
+
+    private final MutableLiveData<String> titleLiveData;
+
+    private final MutableLiveData<String> colorLiveData;
+
+    private final MutableLiveData<String> publicityLiveData;
+
+    private final MutableLiveData<String> errorLiveData;
+
+    private final MutableLiveData<Boolean> successDeleteBookLiveData;
+
+    private final MutableLiveData<String> delBookErrorLivedata;
+
+    public BooksViewModel() {
+        this.retrofit = new Retrofit.Builder()
+                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/citrus/")
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+        this.booksRest = retrofit.create(BooksRest.class);
+        this.booksLiveData = new MutableLiveData<>();
+        this.titleLiveData = new MutableLiveData<>();
+        this.colorLiveData = new MutableLiveData<>();
+        this.publicityLiveData = new MutableLiveData<>();
+        this.errorLiveData = new MutableLiveData<>();
+        this.successDeleteBookLiveData = new MutableLiveData<>();
+        this.delBookErrorLivedata = new MutableLiveData<>();
+    }
+
+    //public MutableLiveData<Book> getBookLiveData() { return bookLiveData;}
+
+    public MutableLiveData<Boolean> getSuccessDeleteBookLiveData() {
+        return successDeleteBookLiveData;
+    }
+
+    /*public void createBook(String accountId, String token , String title, String color, Boolean publicity){
+        Call<String> call = booksRest.createBook(accountId, token , title, color, publicity);
+
+            call.enqueue(new Callback<String>() {
+                @Override
+                public  void onResponse(Call<String> call, Response<String> response) {
+                    if(response.isSuccessful()) {
+                        System.out.println("success!" + response.body());
+                    }else {
+                        System.out.println("fail");
+                        errorLiveData.setValue(parseStatusCode(response.code()));
+                    }
+                }
+
+                @Override
+                public void onFailure(Call<String> call, Throwable t) {
+
+                }
+            });
+
+    }*/
+
+    public void loadBooks(String account_id, String token){
+//        Call<ArrayList<Book>> call = booksRest.getBooks(account_id);
+//
+//        call.enqueue(new Callback<ArrayList<Book>>() {
+//            @Override
+//            public void onResponse(Call<ArrayList<Book>> call, Response<ArrayList<Book>> response) {
+//                if (response.isSuccessful()) {
+//                    ArrayList<Book> book = response.body();
+//                    //for()
+//                }
+//            }
+//
+//            @Override
+//            public void onFailure(Call<ArrayList<Book>> call, Throwable t) {
+//
+//            }
+//        });
+    }
+
+    /*public void deleteBook(String account_id, Integer book_id, String token){
+        Call<ArrayList<Book>> call = booksRest.deleteBook(account_id, book_id, token);
+
+        call.enqueue(new Callback<Void>() {
+            @Override
+            public void onResponse(Call<Void> call, Response<Void> response) {
+                if (response.isSuccessful()) {
+                    deleteBookLiveData(account_id, book_id);
+                    System.out.println("DELETE");
+                } else {
+                    System.out.println("response error");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<Void> call, Throwable t) {
+                System.out.println("correspondence error" + t);
+            }
+        });
+    }*/
+
+    private void deleteBookLiveData(String account_id, Integer book_id) {
+        ArrayList<Book> delData = new ArrayList<>();
+
+    }
+
+    /*public void setTitle(String account_id, Integer book_id, String title, String token){
+        Call<Void> call = booksRest.setTitle(account_id, book_id, title, token);
+
+        call.enqueue(new Callback<Void>() {
+            @Override
+            public void onResponse(Call<Void> call, Response<Void> response) {
+                if (response.isSuccessful()){
+                    titleLiveData.setValue(title);
+                    System.out.println(response.code());
+                    System.out.println("Success SetTiTle" + title);
+                } else {
+                    System.out.println("response error");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<Void> call, Throwable t) {
+                System.out.println("NetWorkError" + t);
+            }
+        });
+    }
+
+    public void setColor(String account_id, Integer book_id, String color, String token){
+        Call<Void> call = booksRest.setColor(account_id, book_id, color, token);
+
+        call.enqueue(new Callback<Void>() {
+            @Override
+            public void onResponse(Call<Void> call, Response<Void> response) {
+                if (response.isSuccessful()){
+                    colorLiveData.setValue(color);
+                    System.out.println(response.code());
+                    System.out.println("Success SetTiTle" + color);
+                } else {
+                    System.out.println("response error");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<Void> call, Throwable t) {
+                System.out.println("NetWorkError" + t);
+            }
+        });
+    }
+
+    public void setPublicity(String account_id, Integer book_id, String publicity, String token){
+        Call<Void> call = booksRest.setpublicity(account_id, book_id, publicity, token);
+
+        call.enqueue(new Callback<Void>() {
+            @Override
+            public void onResponse(Call<Void> call, Response<Void> response) {
+                if (response.isSuccessful()){
+                    publicityLiveData.setValue(publicity);
+                    System.out.println(response.code());
+                    System.out.println("Success SetTiTle" + publicity);
+                } else {
+                    System.out.println("response error");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<Void> call, Throwable t) {
+                System.out.println("NetWorkError" + t);
+            }
+        });
+    }*/
+
+    private String parseStatusCode(Integer code) {
+        switch (code) {
+            case 404:
+                System.out.println("見つかりませんでした");
+                return null;
+            /*case 401:
+                System.out.println("見つかりませんでした");
+                return ErrorType.InvalidToken.getText();
+            case 400:
+                System.out.println("見つかりませんでした");
+                return ErrorType.ResponseError.getText();
+            case 500:
+                System.out.println("見つかりませんでした");
+                return ErrorType.ServerError.getText();*/
+            default:
+                System.out.println("見つかりませんでした");
+                return null;
+        }
+    }
+}
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