蓝思值（Lexile Measure）是一种衡量读者阅读能力和书籍文本难度的标准化指标，广泛应用于英语阅读教育领域。
下面是《Magic Tree House》系列每部作品的蓝思值，数据来源 https://www.lexile.com/
| 系列编号 | 书名 | 蓝思值 |
|---|---|---|
| 1 | DINOSAURS BEFORE DARK | 510L |
| 2 | THE KNIGHT AT DAWN | 500L |
| 3 | MUMMIES IN THE MORNING | 500L |
| 4 | PIRATES PAST NOON | 490L |
| 5 | NIGHT OF THE NINJAS | 490L |
| 6 | AFTERNOON ON THE AMAZON | 480L |
| 7 | SUNSET OF THE SABERTOOTH | 520L |
| 8 | MIDNIGHT ONTHEMOON | 490L |
| 9 | DOLPHINS AT DAYBREAK | 540L |
| 10 | GHOST TOWN AT SUNDOWN | 510L |
| 11 | LIONS AT LUNCHTIME | 550L |
| 12 | POLAR BEARS PAST BEDTIME | 570L |
| 13 | VACATION UNDER THE VOLCANO | 410L |
| 14 | DAY OF THE DRAGON KING | 380L |
| 15 | VIKING SHIPS AT SUNRISE | 570L |
| 16 | HOUR OF THE OLYMPICS | 380L |
| 17 | TONIGHT ON THE TITANIC | 550L |
| 18 | BUFFALO BEFORE BREAKFAST | 560L |
| 19 | TIGERS AT TWILIGHT | 510L |
| 20 | DINGOES AT DINNERTIME | 570L |
| 21 | CIVIL WAR ON SUNDAY | 580L |
| 22 | REVOLUTIONARY WAR ON WEDNESDAY | 450L |
| 23 | TWISTER ON TUESDAY | 570L |
| 24 | EARTHQUAKEIN THE EARLY MORNING | 590L |
| 25 | STAGE FRIGHT ON A SUMMER NIGHT | 560L |
| 26 | GOOD MORNING, GORILLAS | 510L |
| 27 | THANKSGIVING ON THURSDAY | 590L |
| 28 | HIGH TIDE IN HAWAII | 570L |
| 29 | A BIG DAY FOR BASEBALL | 400L |
| 30 | HURRICANE HEROES IN TEXAS | 470L |
| 31 | WARRIORS IN WINTER | 410L |
