Simplify the following text for a Grade 10 native English-speaking person.
Original: Compton 's by Britannica , first published in 2007 , incorporating the former Compton 's Encyclopedia , is aimed at 10 â `` 17 year olds and consists of 26 volumes and 11,000 pages .
Simplified: Compton 's by Britannica , published in 2007 , with the old Compton 's Encyclopedia , in it is written for teenagers who are 10 â `` 17 years old and has 26 books and 11,000 pages in it .