For a perfect summer/bath time read, we recommend The Art of Dancing in the Rain by Garth Stein (get your tissues ready), 'Are you there Vodka, It's me Chelsea' by Chelsea Handler (Again, get the tissue ready, this time because you'll be laughing so hard tears will follow) and The History of Love (if you're ready to swoon) by Nicole Krauss.
Enjoy and you're welcome in advance!