This F novel creates adventure for readers. Jack and Annie are off on another mission for Merlin; luckily, they have Teddy to help. From underwater caves to mystical selkies, students will love to read this. This book would be best as IR. ESOL 42 and 44 could be beneficial in that timelines and thinking skills could be used to show deeper understanding. The UDL principals 3.3 and 3.4 regarding comprehension would be appropriate for this read.