How to add variable to SQL query with "WHERE something LIKE" in Python?

Question

PostgreSQL

Good day!
I wanted to quickly implement book search in Flask, but I can't add a variable to the expression:

@app.route("/book-<string:book>")
def book(book):
    oneBook = db.execute("SELECT * FROM books WHERE title LIKE '%:book%' OR isbn LIKE '%:book%' OR author LIKE '%:book%'",
    {"book": book}).fetchall()

Please explain how this can be done.