"Frank in the Mountains" is an exciting adventure book from the famous writer Harry Castlemon. The main character, young Frank, decides to go on vacation to the mountains, where he will have to face a number of challenges and dangers. The book has exciting storylines that will lift your spirits and expand your imagination. It is an ideal choice for lovers of exciting literature and adventure stories. "Frank in the mountains" is a book that will leave you on every page eager to continue reading.