Simplify the following text for a Grade 13 native English-speaking person.
Original: He authored two books and some academic articles on Cuban politics , focusing among other things on the US embargo , which he claimed ( in the book `` La TransiciÃ n Cubana y el `` Bloqueo '' Norteamericano '' and other works ) has a strong counter-productive effect , in supporting the continuation of Cuba 's regime .
Simplified: He wrote two books and some articles on Cuban politics , especially on the US embargo , which he thinks ( in the book `` La TransiciÃ n Cubana y el `` Bloqueo '' Norteamericano '' and other works ) is not good .