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Category name Best seller rank 50th book's rank Median sales($) Median price ($) Volatility (%) New releases (%) Self pub.(%) KDP Select (%) Competition
Books > Fiction > Science Fiction > Space Opera 83 3,477 £2,172 £3.88 87% 18% 31% 50% ~ 30,000
Books > Fiction > Science Fiction > Space Exploration 112 5,154 £1,086 £3.88 95% 20% 20% 50% ~ 7,000
Books > Fiction > Science Fiction > Military > Space Fleet 378 6,043 £1,508 £4.49 85% 25% 50% 77% ~ 7,000
Books > Fiction > Science Fiction > Military > Space Marine 351 10,559 £1,081 £4.29 100% 20% 55% 77% ~ 6,000
Books > Science & Nature > Engineering & Technology > Aeronautics & Aerospace 197 13,289 £1,118 £9.99 100% 31% 20% 5% ~ 20,000
Books > Children's Books > Science, Nature & How It Works > Aeronautics & Space 557 50,642 £2,091 £7.47 95% 0% 0% 0% ~ 4,000
Books > Young Adult > Science Fiction & Fantasy > Science Fiction > Space Opera 4,813 204,705 £157 £5.62 100% 10% 30% 36% ~ 483
Books > Science & Nature > Engineering & Technology > Aeronautics & Aerospace > Aerospace & Aviation Technology 4,393 211,711 £689 £12.31 95% 20% 25% 0% ~ 7,000
Books > Young Adult > Science & Technology > Technology > Air & Space Science 23,250 451,796 £283 £10.13 100% 5% 15% 3% ~ 316
Books > Science & Nature > Engineering & Technology > Aeronautics & Aerospace > Astronautics 36 657,866 £358 £12.79 95% 20% 25% 0% ~ 10,000
Books > Science & Nature > Astronomy & Cosmology > Space Travel & Exploration 96,280 1,646,438 £0 £8.99 90% 10% 50% 0% ~ 671