Ganesh Stotra Ratnakar is a collection of stotras (hymns) dedicated to Lord Ganesha, the remover of obstacles. The stotra is a part of Hindu scripture and is considered one of the most sacred and powerful prayers for Ganesha.
The Gita Press has launched an official website and mobile application called "Gita Press" (available on Android). They have started digitizing their content. You may find this stotra in their digital library section, often within the Shri Hanuman Chalisa or Stotra Ratnavali sections. ganesh stotra ratnakar gita press pdf download full