A secret submarine, making new friends, a deep mountain lake, and a menacing sea monster. Book 6 in the award-winning, wholesome Wright Cousin Adventures series by Gregory O. Smith! “The submarine was now deep down inside the watery canyon and picking up speed. Out of the corner of his eye, Tim saw something dark and sinister sweep by.” Clear the bridge! Up periscope! The five Wright cousins have a submarine and they know how to use it! But the deeper they dive in the waters of Lake Pinecone, the more mysterious the lake becomes. It contains many hidden and unexpected secrets! To top it off, something spooky is wrecking boats on the lake and it’s downright scary. Can the Wright cousins find out what the threat is before they and their submarine become its next victim? “Young readers with a sense of adventure…will appreciate the Wright Cousins and the many stories they have to share. This is a charming addition to libraries for middle grade readers.” – Riverdancer “Vine Review” This wholesome, action-packed series is filled with exciting STEM accurate technology and family friendly humor. Books 6-9 are designed to be read in order. Dive into the The Great Submarine Adventure today! "This is my new favorite series!" -- Anne R. " Outstanding Kid Series! I normally don't review books on here [Amazon] unless highly impressed! So many children's books today are such a poor excuse for literature - poor plots, undeveloped characters, even poor spelling and use of English. What a delight to find a highly qualified author, Greg Smith and to finally find a series that are uplifting, well written and adventurous!" (Amazon 5-star review by Buzzyflight, Nov. 10, 2020) " Kids favorite book-- I sent my niece and nephew several books for summer reading. This has been the favorite of both kids...Appropriate for all kids, just good fun...Highly recommend."-Consultx " My kids have read the whole series and asking for more!-- My kids are very much into action and adventure books. We have read the entire series together during family reading time. They have loved all of them and now cannot wait for the author to write more. These books are full of tasty little tidbits of true information including some historical references and accurate STEM information applied to situations in the book. I loved these for my kids."-Clint G " Mystery and Fun-- Purchased for my grandson--I found it to be quite a thrilling read--perfect for an almost 11 year old. Full of fun and adventure."-H. W. Longfellow " Great new series (to us)-- Bought for a 7 year old bookworm granddaughter who loves adventure stories and read it in almost one session!"-Reviewer in Canada " Worthwhile books-- Wonderfully written story, my son has devoured all 12 of the books in the series."-Susan " Couldn't put the book down!-- I purchased this book for my eight year old granddaughter. She enjoyed it so much she asked me to purchase the next book in the series, Desert Jeepers!"-KJD Pretty cool how a submarine works!   Gregory O. Smith is the author of the 15 book, award-winning  Wright Cousin Adventures series, the time travel adventure  The Ha t, George Washington, and Me! , the award-winning friendship and wilderness survival adventure  Strength of the Mountains,  and the exciting, page turning military adventure, Rheebakken 2--Last Stand for Freedom.