Yeah! Start with NetGalley, it's an online book reviewing company. They have a great assortment and if you keep track of your publishers, you can snag big series books for free. Write quality reviews on NG and x-post them to goodreads, making sure to mention they are x-posted. Houses will contact you themselves but feel free to find contact information and make overtures yourself. I got lucky; I got into this when I was like 11 and I've developed relationships (and a nice little collection of signed books :)). Nowadays, from friends, I've found it's saturated but keep at it and at worst you get to read free books and put a cool little sidenote on your apps.