I am an odd number. Take away one letter and I become even. What number am I?

As a child, I remember being mesmerized by riddles. They constituted stimulating challenges that I would go to lengths to try to solve. Ten-year-old me actively searched for riddle books in the school library and recruited friends to help me in the process. Sharing and solving riddles with friends and family thus became one of the exciting and stimulating experiences of my childhood

Now that I've accumulated some years, I'd like to share this experience with the newer generation. The world is changing and so is the entertaining available for kids. It's inevitable that the majority of kids will turn to video games for entertainment. However, this is written for those that want to add in a little mental stimulation and creativity to their leisure time.

This riddle book is quite the adventure- for kids and for just about everyone else. In it, you will find 365 riddles organized by level of difficulty, with riddles ranging from EASY to EXPERT. If you're in the mood for humor, check out the Funny Riddles section. It'll crack you up. If you want to surprise all your mates at school (or at work) with your wit and intellect, then head to the Classics section. Go all out; you have enough riddles for the entire year

The Kindle version of this book has been carefully designed to make navigation through the riddles, sections and answer keys a seamless experience. Enjoy.

PS: The answer is 7. If you take out the 's', it's 'even'.