Answer:
Sir Arthur Conan Doyle.
Step-by-step explanation:
Sir Arthur Ignatius Conan Doyle was a Scottish detective story writer, famous for his Sherlock Holmes' stories.
The above quote "Where there is no imagination, there is no horror" is from the very first novel he wrote, "A Study in Scarlet". This book is one of his first ever stories about the character of Sherlock Holmes and his friend Dr. Watson. The complete quote says - "There is a mystery about this which stimulates the imagination; where there is no imagination, there is n fear".