diff --git a/src/services/book_library/mod.rs b/src/services/book_library/mod.rs
index 952fa03..51835f6 100644
--- a/src/services/book_library/mod.rs
+++ b/src/services/book_library/mod.rs
@@ -4,6 +4,8 @@ use serde::de::DeserializeOwned;
 
 use crate::config::CONFIG;
 
+use self::types::{BaseBook, Page};
+
 async fn _make_request<T>(
     url: &str,
     params: Vec<(&str, String)>,
@@ -53,16 +55,13 @@ pub async fn get_books(
     page_size: u32,
     uploaded_gte: String,
     uploaded_lte: String,
-) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
-    let _params: Vec<(&str, String)> = vec![
+) -> Result<Page<BaseBook>, Box<dyn std::error::Error + Send + Sync>> {
+    let params: Vec<(&str, String)> = vec![
         ("page", page.to_string()),
-        ("page_size", page_size.to_string()),
+        ("size", page_size.to_string()),
         ("uploaded_gte", uploaded_gte),
         ("uploaded_lte", uploaded_lte)
     ];
 
-    // TODO
-    // _make_request(format!("/api/v1/books/").as_str(), params).await;
-
-    Ok(())
+    _make_request(format!("/api/v1/books/base/").as_str(), params).await
 }
diff --git a/src/services/book_library/types.rs b/src/services/book_library/types.rs
index e57d24b..4edd9a1 100644
--- a/src/services/book_library/types.rs
+++ b/src/services/book_library/types.rs
@@ -36,6 +36,12 @@ pub struct BookWithRemote {
     pub authors: Vec<BookAuthor>,
 }
 
+#[derive(Deserialize, Debug, Clone)]
+pub struct BaseBook {
+    pub id: i32,
+    pub available_types: Vec<String>
+}
+
 impl BookWithRemote {
     pub fn from_book(book: Book, remote_id: u32) -> Self {
         Self {
@@ -106,3 +112,15 @@ impl BookWithRemote {
         format!("{caption_title}\n\n{caption_authors}")
     }
 }
+
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct Page<T> {
+    pub items: Vec<T>,
+    pub total: u32,
+
+    pub page: u32,
+
+    pub size: u32,
+    pub pages: u32,
+}
diff --git a/src/services/mod.rs b/src/services/mod.rs
index 27fed9b..f100fd2 100644
--- a/src/services/mod.rs
+++ b/src/services/mod.rs
@@ -7,7 +7,7 @@ use tracing::log;
 
 use crate::{prisma::cached_file, views::Database};
 
-use self::{download_utils::DownloadResult, telegram_files::{download_from_telegram_files, UploadData, upload_to_telegram_files}, downloader::{get_filename, FilenameData, download_from_downloader}, book_library::get_book};
+use self::{download_utils::DownloadResult, telegram_files::{download_from_telegram_files, UploadData, upload_to_telegram_files}, downloader::{get_filename, FilenameData, download_from_downloader}, book_library::{get_book, types::BaseBook, get_books}};
 
 
 pub async fn get_cached_file_or_cache(
@@ -132,8 +132,75 @@ pub async fn download_from_cache(
     })
 }
 
-pub async fn start_update_cache(
-    _db: Database
-) {
-    // TODO
+pub async fn get_books_for_update() -> Result<Vec<BaseBook>, Box<dyn std::error::Error + Send + Sync>> {
+    let mut result: Vec<BaseBook> = vec![];
+
+    let page_size = 50;
+
+    let uploaded_gte = "".to_string();
+    let uploaded_lte = "".to_string();
+
+    let first_page = match get_books(
+        1,
+        page_size,
+        uploaded_gte.clone(),
+        uploaded_lte.clone()
+    ).await {
+        Ok(v) => v,
+        Err(err) => return Err(err),
+    };
+
+    result.extend(first_page.items);
+
+    let mut current_page = 2;
+    let page_count = first_page.pages;
+
+    while current_page <= page_count {
+        let page = match get_books(current_page, page_size, uploaded_gte.clone(), uploaded_lte.clone()).await {
+            Ok(v) => v,
+            Err(err) => return Err(err),
+        };
+        result.extend(page.items);
+
+        current_page += 1;
+    };
+
+    Ok(result)
+}
+
+
+pub async fn start_update_cache(
+    db: Database
+) {
+    let books = match get_books_for_update().await {
+        Ok(v) => v,
+        Err(err) => {
+            log::error!("{:?}", err);
+            return;
+        },
+    };
+
+    for book in books {
+        for available_type in book.available_types {
+            let cached_file = match db
+                .cached_file()
+                .find_unique(
+                    cached_file::object_id_object_type(book.id, available_type.clone())
+                )
+                .exec()
+                .await {
+                    Ok(v) => v,
+                    Err(err) => {
+                        log::error!("{:?}", err);
+                        continue;
+                    }
+                };
+
+            if cached_file.is_some() {
+                continue;
+            }
+
+            cache_file(book.id, available_type, db.clone()).await;
+        }
+    }
 }