You need to get your readers onto your email list with a free offer in the back of your book, and then you need to build a relationship with them, and remind them to review.
That will be much more effective than reaching out to strangers.
Our seal can be seen on book covers from indie authors to iconic publishers like Simon & Schuster.
All reviews come with a Readers' Favorite Review Page and a host of free features to help you promote your book and your new review.
Your review will also be indexed by search engines like Google, which recognizes our reviews and formats them with their starred rating, just like Amazon and Goodreads.
All 5-star reviews receive a FREE "Five Star" digital seal for your website and a high-resolution version for your book cover.
I got 8500 young adult readers on my email list before I published my first novel.
That helped me to get enough reviews to launch well.
Advertising doesn’t really help, because you’ll spend to much and most people won’t buy it without more reviews.
So your choices are to either do a free campaign first with a big push (easiest) or build a list of potential reviewers and send them an ARC copy (best). You could also give away a sample or short story or prequel, but you need to give readers enough valuable content to feel satisfied and want more.