PERSON@1 's by PERSON@2 , first published in NUMBER@1 , incorporating the former PERSON@1 's Encyclopedia , is aimed at NUMBER@2 year olds and consists of NUMBER@3 volumes and NUMBER@4 pages .

PERSON@1 's by PERSON@2 , published in NUMBER@1 , with the old PERSON@1 's Encyclopedia , in it is written for teenagers who are NUMBER@5 -- NUMBER@6 years old and has NUMBER@3 books and NUMBER@4 pages in it .
