.book-container {
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1300px;
}
@keyframes initAnimation {
  0% {
    transform: rotateY(-1deg);
  }
  100% {
    transform: rotateY(-15deg);
  }
}
.book {
  width: 280px;
  height: 395px;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateY(-15deg);
  transition: 1s ease;
  animation: 1s ease 0s 1 initAnimation;
}
.book-container:hover .book, .book-container:focus .book {
  transform: rotateY(-1deg);
}
.book > :first-child {
  position: absolute;
  top: 0;
  left: 0;
  background-color: red;
  width: 280px;
  height: 395px;
  transform: translateZ(25px);
  background-color: #8d9096;
  border-radius: 0 2px 2px 0;
  box-shadow: 5px 5px 20px #666;
}
.book::before {
  position: absolute;
  content: ' ';
  background-color: blue;
  left: 0;
  top: 3px;
  width: 48px;
  height: 389px;
  transform: translateX(252px) rotateY(90deg);
  background: linear-gradient(90deg, #fff 0%, #f9f9f9 5%, #fff 10%, #f9f9f9 15%, #fff 20%, #f9f9f9 25%, #fff 30%, #f9f9f9 35%, #fff 40%, #f9f9f9 45%, #fff 50%, #f9f9f9 55%, #fff 60%, #f9f9f9 65%, #fff 70%, #f9f9f9 75%, #fff 80%, #f9f9f9 85%, #fff 90%, #f9f9f9 95%, #fff 100%);
}
.book::after {
  position: absolute;
  top: 0;
  left: 0;
  content: ' ';
  width: 280px;
  height: 395px;
  transform: translateZ(-25px);
  background-color: #b2bed7;
  border-radius: 0 2px 2px 0;
  box-shadow: -10px 5px 30px 5px #8ba0b8;
}