books-api.ts

type Book = {
  id: string
  image: string
  title: string
  description: string
  duration: number // (milliseconds?)
  audio: string 
  chapters: Chapter[]
}

type Chapter = {
  id: string
  title: string
  start: number /* 0-1 */
  stop: number /* 0-1 */
}

type Account = {
  user_id: string
  books: [{
    book_id: string
    progress: number /* 0-1 */
  }]
}

api.books.list({ genre: 'Science Fiction' })
api.books.search({ query: 'Harry Potter' })
api.books.getById('123')
api.account.get()
api.account.updateBookProgress({ book_id, progress })