As a means to successfully proofread your book, you could utilize certain techniques such as reading backward sentence by sentence, aiming at one problem once at a time. Further, you can also read aloud it as an effective proofreading strategy that helps you to fix weird sentences and grammar mistakes. In addition, there are dozens of experienced and proven Book Proofreading Services available these days, if you have any issues or are unable to proofread your content reach out to them. Additionally, you can as well use tools such as Grammar to proofread your work. Lastly, take a break and approach your work with a fresh eye.