I can only echo what NewLondon6 said, but I would recommend you check out the original books if you ever have the chance. They're good and short (about 100 pages each). I would recommend you start with the short story collections, simply because they're more fast paced and fun than the novels.
My first Sherlock Holmes book was this collection that recreates the stories as they first appeared in the Strand Magazine. https://www.amazon.com/-/es/Arthur-Conan-Doyle/dp/0890090572/ It's only like $1.30 on Amazon.
Also great is the 100 years of works about Sherlock Holmes to enjoy. Not just adaptations like this one but essays analyzing it and museums.