(something) (one) can get (one's) teeth into

Something that one can involve oneself in with one's utmost energy, determination, or enthusiasm. Have you read this one yet? It's a mystery you can really get your teeth into—total page-turner. This new project I'm developing is something my whole staff can really get their teeth into. She's a consultant looking for a new start-up she can really get her teeth into, so I think she'd be interested in working with you.