You could use the time of travelling to looking some valueable books
8 [7 f! p4 h& E8 nYou can use your finger lead you to follow the details when you read the book
8 g, [, b, `3 t) E. YIt is very attractive to look many books at the same time$ @, h* B- a0 B9 f1 t4 H" V' G
It is just like chamical effect when you read a book7 \5 ]& O" e) W4 `# G
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