I normally charge $250 per finished hour of text (usually, around 10,000 words). Yours would be just under 6.5 hours. So, I'm giving you a discount at this rate. I have numerous audiobooks to my credit on Audible and Bound.
If you would like music and/or sound effects mixed in, it's $50 extra per finished hour, and you would provide the music and/or sound effects.
I've been a VO professional for over 10 years, doing everything from commercials to audiobooks to video games to cartoons to everything in between, and will deliver quickly in the desired file format with fast communication.
My demos are available on my profile.
Equipment and software include:
Shure KSM44 microphone
Focusrite Scarlet Solo preamp
Cakewalk SONAR X2
Adobe Audition CC