Three Hearts and Three Lions is one of the iconic novels behind Dungeons & Dragons, and hence all of modern fantasy. Holger Carlsen is a Danish engineer pulled out of the 20th century to a fantasy world where the realms of men are beset by the forces of Chaos. He meets with fantastic beings; witches, faeries, dwarves, and giants, finds loyal companions and courtly love, and quests to reclaim his true identity and pivotal role in the Great Battle to Come.

Anderson has a way with words, and does some nice stuff with the 'modern man in medieval times' bit. Holger is very much a classic hero, with few if any flaws. The depictions of the faerie court in the first bit are top notch. I dislike the use of dialect to indicate strange accents (Scottishoid?), and two of Holger's companions speak in thick dialect. Over all, this is a classic that still holds up today, and a must-read for any fantasy aficionado.