People often find ideas for their next book to read through various sources, which can vary depending on their age group. Here are some ways people of different age groups might discover their next great read:

**Children (3-5 years old)**

* Picture books and early readers are often recommended by parents, caregivers, or teachers.
* They might hear about a book from a friend or classmate at school or daycare.
* Parents may browse through bookstores or online retailers, such as Amazon, to find popular children's books.
* Many children's books are adapted from popular TV shows or movies, so kids may be interested in reading books based on their favorite characters.

**Children (5-8 years old)**

* Kids in this age group often rely on their parents, teachers, or librarians to recommend books.
* They may browse through the bookshelves at home, school, or the local library to find a book that interests them.
* Book series, such as "The Magic Tree House" or "Captain Underpants," can be a great way to hook kids on reading.
* Friends and classmates may also recommend books to each other.

**Preteens (9-12 years old)**

* Preteens often start to develop their own reading interests and may explore different genres, such as fantasy, adventure, or humor.
* They may read book reviews or recommendations online, such as on websites like Goodreads or Scholastic.
* Friends and classmates can still be a significant source of book recommendations.
* Book clubs or reading groups at school or the library can also introduce preteens to new books and authors.

**Teens (13-18 years old)**

* Teens often find book recommendations through social media, online book communities, and book blogs.
* They may read reviews on websites like Goodreads or Amazon to discover new books and authors.
* Friends and classmates can still play a significant role in recommending books.
* Many teens enjoy reading books that have been adapted into movies or TV shows, so they may be motivated to read the book before watching the adaptation.

**Mature Young Adults (19-25 years old)**

* Young adults may discover new books through online book communities, social media, and book blogs.
* They may read reviews on websites like Goodreads or Amazon to find books that interest them.
* Friends and classmates can still recommend books, but they may also explore books recommended by influencers or booktubers.
* Many young adults enjoy reading books in a particular genre, such as fantasy, romance, or thriller, and may seek out new books in that genre.

**Adults**

* Adults often find book recommendations through online book communities, social media, and book blogs.
* They may read reviews on websites like Goodreads or Amazon to discover new books and authors.
* Friends, family, and colleagues can recommend books to each other.
* Many adults enjoy reading books that have been recommended by book clubs, literary awards, or bestseller lists.

In general, people of all ages may also find book recommendations through:

* Book awards and bestseller lists
* Literary magazines and websites
* Book festivals and author events
* Online bookstores and retailers
* Public libraries and book recommendations from librarians

Ultimately, the sources of book recommendations can vary widely depending on individual preferences and habits.