In an interview with The New Zealand Herald's Scott Kara, Scribe said, "I really put a lot of thought into [Rhyme Book] and because I'd come from Scribe the rap star, I really wanted this album to be Scribe the dude next door. The real me rather than the guy on TV." Musically, he wanted to record "a lot of different kinds of songs so in a way there's something in there for everyone. It's like a box of chocolates." On Breakfast, Scribe said that "it's a good collection of...different types of hip hop...that's why I called it Rhyme Book because it kinda represents my rhyme book." He also wanted to show his growth and flexibility as an artist since The Crusader with different types of songs.
Rhyme Book received mixed reviews from critics. Allmusic's Jody Macgregor gave the album three-and-a-half out of five stars, describing it as "world-class, almost" because of a "few songs [that] hold Rhyme Book back from being a real classic". Rebecca Barry of The New Zealand Herald said that Rhyme Book was not of the same calibre as The Crusader, but called it "a quality album that exposes a more thoughtful scribe on Scribe". The reviewer from The Dominion Post was let down, and viewed the album as "a desperate attempt to be considered the Aotearoa version of Kanye West," and rated it two stars out of five."
Rhyme Book debuted on the New Zealand Albums Chart at its peak position of number four, and spent a total of four weeks on the top forty chart. In Australia, the album debuted at number nine of the Australian Albums Chart, slipping to number eighteen the next week. After a total of four weeks in the top fifty, it fell off the chart.