Books 1, 2 & 3 of The Endangered Series are available in both eBook and Paperback on Amazon here.
Signed paperbacks (of 1st editions, which are now out of print) can be found in these stores:
You can also purchase a signed paperback of any and all books in the series directly from the author for $15/each via PayPal (or get all 3 for $37)*:
*Price includes S&H. Arrives in 2-3 weeks depending on stock. Please specify which book and confirm mailing address. Ships to U.S. addresses only. All sales are final.