Award-winning science teacher Bob Pflugfelder's "Nick and Tesla" series will enchant readers with adventure mysteries.  To top it off, each book includes details of how to replicate their working, but wacky, gadgets made from ordinary household items.  So far, the 11-year-old siblings investigate in High Voltage Danger Lab, Robot Army Rampage, Super-Cyborg Gadget Glove and Secret Agent Gadget Battle.  These are available in audio and downloadable media, so start reading!