This Week in Middle Grade — Week of May 18, 2026

Middle Grade Book of the Week

The Sea of Monsters by Rick Riordan

Published: Not Available

This week, Rick Riordan's The Sea of Monsters gained 794 new ratings, bringing its total to 1,399,193, showing a slight growth of 0.06%. While many books in the trend report are holding steady or showing modest increases, this book, with its established popularity, continues to maintain a strong following despite being a non-new release in a saturated market.

Compared to other trending titles, The Sea of Monsters still holds a commanding presence in the Middle Grade landscape, well ahead of many newer releases. Titles like Keeper of the Lost Cities and The Boy, the Mole, the Fox and the Horse barely added more than a hundred ratings this week. Its continued relevance highlights the lasting impression Riordan's Percy Jackson series holds on young readers and the nostalgia factor for older fans.

While it's difficult to pinpoint exact drivers of interest this week, the sustained growth may be attributed to a recent uptick in discussions related to mythology and the continuing engagement from readers through platforms like BookTok, which often revisits classic stories.

Stats: 1,398,399 → 1,399,193 (+794)

Also Trending in Middle Grade

The Second Life of Snap: A Hopeful Middle Grade Novel about Friendship from a Newbery Medalist, for Kids by Erin Entrada Kelly

Published: May 12, 2026

This new release is gaining traction quickly, with a remarkable growth rate of 15% this week. The book added 18 ratings, reflecting early interest in a fresh narrative that explores themes of friendship and technology.

Stats: 124 → 142 (+18)

Harry Potter and the Goblet of Fire by J.K. Rowling

Published: February 10, 2026

The audio adaptation of this beloved title has added 109 new ratings with a steady growth of 2.8%. This performance indicates that the Harry Potter series continues to attract listeners, reinforcing its place as a cornerstone of Middle Grade literature.

Stats: 3,843 → 3,952 (+109)

Magnitude by Jennifer A. Nielsen

Published: March 3, 2026

This newly released historical fiction added 18 ratings for a growth rate of 4.3%. The compelling setting of the 1906 earthquake captures attention, indicating strong initial interest among readers looking for thrilling and heartwarming stories.

Stats: 415 → 433 (+18)

Amari and the Metalwork Menace by B.B. Alston

Published: February 24, 2026

This ongoing series chapter shows solid growth, increasing by 27 ratings with a rise of 2.8%. The ongoing narrative regarding Amari keeps readers engaged and eager for more, evidenced by this steady uptick in interest.

Stats: 961 → 988 (+27)

The Hybrid Prince by Tui T. Sutherland

Published: March 3, 2026

The latest addition to the Wings of Fire series increased by 42 ratings, marking a growth of 2.3%. This indicates that readers are eager to delve into the expanding narrative of the series, maintaining its strong fanbase and interest in each new release.

Stats: 1,821 → 1,863 (+42)

Middle Grade Genre Pulse

This week, the Middle Grade genre showed positive momentum, with an overall net delta of 1,743 ratings. The total current ratings stand at 1,952,812, representing growth from last week's 1,951,069. This uptick suggests that despite market fluctuations, readers continue to seek out engaging Middle Grade literature, particularly in established series and fresh narratives from prominent authors.

Pick of the Week goes to The Sea of Monsters due to its consistent ability to add 794 ratings in a single week even after being in the market for an extended time. This resilience in ratings signifies a strong, ongoing interest in Riordan's work that outshines many current releases and illustrates the lasting power of beloved stories in the genre.