diff --git a/src/log.cpp b/src/log.cpp
index 9cb806d..6f376c5 100644
--- a/src/log.cpp
+++ b/src/log.cpp
@@ -32,53 +32,62 @@
 namespace epubgrep::log
 {
 
+namespace blog = boost::log;
+namespace keywords = boost::log::keywords;
+using boost::locale::translate;
 using sev = boost::log::trivial::severity_level;
 
+inline static global_variables global;
+
+fs::path log_dir()
+{
+    fs::path path{helpers::get_env("XDG_STATE_HOME")};
+    if (path.empty())
+    {
+        path = helpers::get_env("HOME");
+        if (!path.empty())
+        {
+            path /= ".local";
+            path /= "state";
+        }
+    }
+    if (!path.empty())
+    {
+        return path /= "epubgrep";
+    }
+    return fs::path{};
+}
+
 void init()
 {
-    namespace keywords = boost::log::keywords;
+    global.textlog = blog::add_file_log(
+        keywords::file_name = (log_dir() / "epubgrep.log").c_str(),
+        keywords::format = "%LineID% [%TimeStamp%] "
+                           "[%ThreadID%]: [%Severity%] %Message%");
+    global.textlog->set_filter(blog::trivial::severity >= sev::info);
 
-    using boost::locale::translate;
+    blog::add_console_log(std::cerr,
+                          keywords::format = translate("WARNING").str()
+                                             + ": %Message%")
+        ->set_filter(blog::trivial::severity == sev::warning);
+    blog::add_console_log(std::cerr, keywords::format = translate("ERROR").str()
+                                                        + ": %Message%")
+        ->set_filter(blog::trivial::severity == sev::error);
+    blog::add_console_log(std::cerr,
+                          keywords::format = translate("FATAL ERROR").str()
+                                             + ": %Message%")
+        ->set_filter(blog::trivial::severity == sev::fatal);
 
-    const auto log_path{[]
-                        {
-                            fs::path path{helpers::get_env("XDG_STATE_HOME")};
-                            if (path.empty())
-                            {
-                                path = helpers::get_env("HOME");
-                                if (!path.empty())
-                                {
-                                    path /= ".local";
-                                    path /= "state";
-                                }
-                            }
-                            if (!path.empty())
-                            {
-                                return (path /= "epubgrep") /= "epubgrep.log";
-                            }
-                            return fs::path{};
-                        }()};
+    blog::add_common_attributes();
+}
 
-    boost::log::add_file_log(keywords::file_name = log_path.c_str(),
-                             keywords::format =
-                                 "%LineID% [%TimeStamp%] "
-                                 "[%ThreadID%]: [%Severity%] %Message%");
+void init_debug()
+{
+    global.textlog->set_filter(blog::trivial::severity == sev::debug);
 
-    boost::log::add_console_log(std::cerr,
-                                keywords::format = translate("WARNING").str()
-                                                   + ": %Message%")
-        ->set_filter(boost::log::trivial::severity == sev::warning);
-    boost::log::add_console_log(std::cerr,
-                                keywords::format = translate("ERROR").str()
-                                                   + ": %Message%")
-        ->set_filter(boost::log::trivial::severity == sev::error);
-    boost::log::add_console_log(std::cerr,
-                                keywords::format = translate("FATAL ERROR")
-                                                       .str()
-                                                   + ": %Message%")
-        ->set_filter(boost::log::trivial::severity == sev::fatal);
-
-    boost::log::add_common_attributes();
+    blog::add_console_log(std::cerr,
+                          keywords::format = "%LineID% DEBUG: %Message%")
+        ->set_filter(blog::trivial::severity >= sev::debug);
 }
 
 } // namespace epubgrep::log
diff --git a/src/log.hpp b/src/log.hpp
index dee7886..338ed95 100644
--- a/src/log.hpp
+++ b/src/log.hpp
@@ -17,22 +17,40 @@
 #ifndef EPUBGREP_LOG_HPP
 #define EPUBGREP_LOG_HPP
 
+#include "fs-compat.hpp"
+
+#include <boost/log/sinks/sync_frontend.hpp>
+#include <boost/log/sinks/text_file_backend.hpp>
 #include <boost/log/sources/global_logger_storage.hpp>
 #include <boost/log/sources/logger.hpp>
 #include <boost/log/trivial.hpp>
+#include <boost/smart_ptr/shared_ptr.hpp>
 
 #define LOG(severity) BOOST_LOG_SEV(epubgrep::log::logger::get(), severity)
 
 namespace epubgrep::log
 {
 
+namespace blog = boost::log;
 using sev = boost::log::trivial::severity_level;
 
+struct global_variables
+{
+
+    boost::shared_ptr<
+        blog::sinks::synchronous_sink<blog::sinks::text_file_backend>>
+        textlog;
+};
+
 BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(
     logger, boost::log::sources::severity_logger_mt<sev>)
 
+fs::path log_dir();
+
 void init();
 
+void init_debug();
+
 } // namespace epubgrep::log
 
 #endif // EPUBGREP_LOG_HPP